FAQ FAQ

Product feaures

Q

Can eneloop be charged up to 2,100 times?

A

This is an estimation based on test results for battery life according to IEC standards (for the number of times charging and discharging). The number may vary, however, depending on how the batteries are used. Battery life does decrease slightly in relationship with the number of times the battery is recharged.

Q

Is it possible to use eneloop worldwide?

A

Yes, if your Panasonic charger has a function called Auto Voltage to handle any voltage between 100 and 240 V. You will likely need a plug adapter for your charger in other countries.

Q

How many mAh is in AA battery?

A

The mAh capacity of an AA battery depends on the type. For Panasonic eneloop rechargeable batteries, the AA minimal capacity is as follows:
eneloop AA: 1900 mAh
eneloop lite AA: 950 mAh
eneloop pro AA: 2500 mAh

Q

How many volts is a AA / AAA battery?

A

Generally, Panasonic eneloop AA batteries have an initial voltage of around 1.2V.
Appliances and devices that require AA batteries are usually designed to work within the range of 0.9 to 1.5V.
Note that while Panasonic eneloop AA batteries have a lower voltage, they are capable of maintaining a steady discharge rate at around 1.0V throughout its use.
Alkaline batteries may have a higher initial voltage of 1.5V, but they’ll gradually lose their voltage throughout their use, reducing the device’s performance over time.

Q

How many volts is a AAA battery?

A

Generally, Panasonic eneloop AAA batteries have an initial voltage of around 1.2V.
Appliances and devices that require AAA batteries are usually designed to work within the range of 0.9 to 1.5V.
Note that while Panasonic eneloop AAA batteries have a lower voltage, they are capable of maintaining a steady discharge rate at around 1.0V throughout its use.
Alkaline batteries may have a higher initial voltage of 1.5V, but they’ll gradually lose their voltage throughout their use, reducing the device’s performance over time.

Charging

Q

How to charge Ni-MH batteries?

A

If you want to recharge your Ni-MH battery, it’s best to do so in a charger that has been specifically created for that type. If you’re using Panasonic eneloop, use a Panasonic eneloop charger.
Every battery manufacturer produces its batteries in a specific (and possibly different) way. Using an other-branded charger to charge Panasonic eneloop batteries may work just fine, but only by using a designated charger we can guarantee you get the most out of your Panasonic eneloop batteries.
For best performance, always try to keep your Ni-MH battery’s energy level above 30% of its maximal capacity.

Q

Can I use another brand’s charger?

A

We strongly recommend you charge eneloop batteries on Panasonic Ni-MH battery chargers. Panasonic chargers are designed to suit Panasonic-brand batteries to ensure the best performance. We can’t take any responsibility for batteries charged with another brand’s charger. Conversely, we advise against charging other makes of battery with a Panasonic charger.

Q

What should I consider when selecting a charger?

A

Before purchasing a Panasonic charger, please consider the following and choose a Panasonic product accordingly:
· What size are my batteries and how many of them do I need to charge at the same time?
· How fast do I need my batteries to be charged?
· Do I need a charging indicator so I can tell when my batteries are charged?
· Do I need a compact charger?
· Will I be using it overseas?

Q

How to discharge a battery?

A

If you want a battery to discharge completely, it’s best to use a specialised charger with a refresh functionality.
Another way is to put a battery in a flashlight or other device and let it stay on until the battery is empty. Do note that we do not recommend this method, as it may cause over discharge and shorter battery life. Discharging with any device other than a specialised charger may cause irreversible damage to your batteries.
Note: all Panasonic batteries come pre-charged. Therefore, it is not necessary to discharge and recharge them before you use them.

Q

Charging Ni-MH batteries with Ni-Cd charger

A

Don't do this, as there are huge differences in the charging conditions between the two types of batteries. It is always advisable to recharge the batteries using a charger appropriate for that type of battery. Charging the batteries with an unsuitable charger could cause them to leak or deteriorate battery performance.

Q

When to charge rechargeable batteries?

A

In general there is no major difference whether you charge the batteries before or after use. However, if you use your rechargeable batteries infrequently, e.g. only once a month, you may forget whether or not the batteries are already charged. In this case, be careful not to overcharge them. It is recommended to charge a rechargeable battery when about 70% to 75% of the capacity has been consumed. Rechargeable batteries are damaged by over-discharging them, which will have its impact on the service life of the batteries and could cause leakage. In order to avoid this, Panasonic urges its customers to charge their batteries when 70% of the battery capacity has been used.

Q

What is the battery charge cycle of rechargeable batteries?

A

Cycle life is the number of times the rechargeable battery can be recharged. Generally, the cycle life of rechargeable batteries varies depending on the appliances in which they are inserted or the way the batteries are used. The cycle life of the rechargeable batteries is defined by IEC directives. This testing is performed within a certain optimal and preset setting for using batteries. The battery will not always be used within these optimal circumstances and in reality this can result in drop of cycle life.

Q

What is the smart charge function?

A

The smart charge function on chargers checks the charging conditions of the batteries, the temperatures of both the batteries and the charger, etc. This allows the charger to individually charge each battery under the best conditions.
This function shortens the charging time by 5% compared to the chargers without such function*. Keep in mind that the charging time varies depending on environmental factors and ambient temperature. It could be the case that the smart charge function does not work depending on the condition of the batteries (E.g. When a battery has degraded).

* This was tested by Panasonic using the BQ-CC08 (launched in Japan in November 2011)

Q

Can Ni-MH chargers charge other battery types such as Alkaline, Zinc carbon, Lithium and NI-Cd?

A

Panasonic strongly advocates not attempting to charge primary batteries such as alkaline, zinc carbon, or lithium, using Ni-MH chargers. Alkaline batteries are not designed for recharging, and doing so could cause leakage and in the worst case lead to the batteries exploding.

Q

Do I need to charge and discharge batteries before use to get optimal performance?

A

All of our eneloop rechargeable batteries are fully charged at our factories before shipment. However, during shipment, batteries may naturally discharge due to the change in environment or temperature. It is recommended to charge a rechargeable battery before use if the situation allows for it in order to reduce damage to the battery.
However, if you have no choice but to buy and immediately use the batteries, feel free to do so. The optimal capacity of the battery will be reached approximately after 2 charge and discharge cycles.

Usage

Q

What about connecting two or more batteries?

A

Do not use mix eneloop batteries with batteries of different capacities or different manufacturers. Connecting eneloop with older eneloop batteries is not a problem unless they are drained. We recommend that eneloop batteries be fully charged before use. To ensure satisfactory performance, we recommend using batteries with the same capacities.

Q

How to store batteries?

A

To maximize shelf life, there are a few things you can do:
Store them at room temperature or at least within the range of 10°C to 25°C. Anything higher could potentially cause batteries to self-discharge quicker. Theoretically, the colder, the better. However: storing them in the refrigerator or freezer may lead to condensation.
Keep them dry, as moisture could lead to condensation and may cause short circuiting and even permanent damage. If possible, keep them in their original packaging, as the packaging was designed to maximize shelf life in the first place. Also, this will make it easier to keep batteries of the same age and expiry date grouped together - which is crucial to maximize their performance.

Q

How to increase battery life?

A

· Leaving empty batteries in the device for a long time without charging them will cause serious damage to the cell electrode (over-discharge) and will shorten the battery life, so avoid doing so.
· Charge the batteries frequently. In theory, batteries should be recharged when 70% of their capacity has been consumed. This will ensure that there is no possibility of over discharging the batteries, which is a major cause of cell damage.
· Do not use batteries at high temperatures as this increases the internal pressure inside the cell, which includes liquid loss and a shorter life span.
· Group the batteries together. When the batteries are grouped together for a device, e.g. 4 x AA for a toy, means that the cells will discharge simultaneously. If a battery is removed for use in another device, ad.es to operate an LED light and then put back into the toy, this translates into 1 battery out of 4 which has a different power level than the others. Because of this, the cell will deteriorate and discharge more quickly.
· In order to maximize the performance of rechargeable batteries, it is important to use cells of the same conditions. Use batteries with the same characteristics, such as:
· same product code
· batteries purchased together
· same charging / discharging time
· The use of rechargeable batteries with different conditions will increase the performance gap between the cells which will lead to unnecessary deterioration of the batteries and their duration. It may be useful to mark the batteries with a permanent marker so that they can be differentiated.
· Make sure the battery cell terminal and the charger are cleaned frequently. Repeated use of rechargeable batteries will cause (invisible) contamination (such as grease or dust) on batteries and charger, which will affect Panasonic products in terms of performance. Consequently, such dirt could obstruct the charge of the cells together with the reduction of the battery discharge time. For these reasons, Panasonic invites its customers to frequently clean their batteries and their chargers using a cloth.

Q

Where’s the best place to store my eneloop batteries?

A

You can store them almost anywhere at room temperature, but don’t store them in humid conditions or in direct sunlight. Do not expose them to high temperatures. If stored fully charged, it’s possible to use them within about five years. However, we recommend giving stored batteries a charge once a year for optimal performance.

Q

How do I know when my battery is at the end of its usable life?

A

The occurrence of the symptoms below could indicate that your rechargeable batteries need replacing.
1. The battery has been used extensively over the last few years and its operating time has started to decrease after charging. As a guideline, if the operating time is cut in half, it is time to replace your rechargeable batteries.
2. If the charging of one battery poses a lot of difficulties e.g. when the charging time becomes increasingly longer. E.g. If it takes double the amount of time to charge a battery compared to other batteries of the same type, it is recommended to replace that particular rechargeable battery.
In the cases above, if a dead battery has to be replaced in an appliance, Panasonic urges its customers to replace all batteries in the used appliance to negate the possibility of overcharging the other batteries.
However, in the case of the defects below, the main cause could be an intermittent contact between battery and terminal.
1. Battery charge is never completed or takes a large amount of time (guideline: 2 to 3 times longer than normal charging time).
2. When the operating time is noticeably short despite having used the battery only a few times. In the cases above, it is recommended to clean the plus and minus terminals of the batteries, and the terminals of the charger with a cleaning cloth.

Q

How should I transport my eneloop batteries?

A

When carrying or storing batteries for longer periods, avoid direct contact with metallic objects such as keys, necklaces, coins, and mobile phones. Also please do not store them in a metallic container as it may cause the product to short circuit. If you do need to use a carry case, we recommend one made from resin.

Q

How to dispose of batteries?

A

As up to 90% of the materials in Panasonic batteries can be recycled, you should always bring them to a recycling point if they’re no longer fit to use. In the EU, all stores selling more than 35 kg of batteries annually are obligated to have a recycling point. For more information on how battery recycling is organised in your country, please head to this website

Q

Can I use different types and brands of batteries?

A

It is highly advisable to use batteries of the same type, brand, size and expiry date in one appliance. The electrical capacity of different types or batches can differ. If such different batteries are used the difference in electrical capacity will grow during usage which could eventually cause one of the batteries to over discharge, leak and even explode. Never use old and new batteries together, this may cause leakage or worse. The remaining electrical capacity in a used battery is less than a new battery, even when it was only used shortly. This causes that when used together with one or more fresh batteries, that this used battery will lose capacity and voltage faster than the new batteries, which could cause eventually an over discharge and leakage of that battery.

Q

How to use a battery properly?

A

· Check the manual for your appliance to see if your appliance needs designated batteries. In the event that the manual for the appliance specifically states it needs designated batteries, please do so. Using different batteries may cause the appliance not to work at all or not as long as expected.
· Insert your batteries correctly keeping the plus and minus pole in mind.
In the case of appliances using an odd number of batteries, they will sometimes work even if one of the batteries is set the other way round with regard to the poles.
However, this is very dangerous as it could cause heat generation, leakage, or exploding batteries. For this reason, please make sure the batteries are inserted correctly.
· Be cautious about short circuits. Short circuits occur when putting a battery into a metal case or into a pocket/drawer in which metal objects are stored (e.g. necklaces, keys or coins). Once a short circuit occurs, there will be excess current flows which will lead to overheating, leakage, or exploding of the battery.
· Always group batteries of the same brand and type. Using batteries with different characteristics such as alkaline, zinc carbon, or Ni-MH together will lead to leakage, exploding batteries and shorter battery service life. Therefore, it is recommended to group batteries of the same product code with your appliances.
· Do not mix old and new batteries together. If mixed together, the batteries could start to leak. In addition, when mixed, the new batteries will not be able to perform at their best.
· Do not damage the surface of the battery. Please note that it is dangerous to use batteries with the outer label peeled off or damaged as this will lead to the batteries short circuiting.
Please make sure the batteries’ labels are not damaged before using the batteries.
· Always make sure your appliances are turned off after use.
Most of the leakage problems are caused by forgetting to turn off appliances after use.
· Make sure you remove the batteries if the appliance will not be used in a long time. Keeping a battery inserted in an appliance could cause leakage and damage to the appliance. Therefore, make sure you remove the batteries if an appliances will not be used in a long time.
· Store your batteries correctly. Make sure you store your batteries at room temperature out of direct sunlight, high temperatures, and high humidity.
· Avoid placing batteries near babies. In the case that a baby or any other person swallows a battery, see a doctor immediately. To avoid this risk, make sure you store your batteries where small children cannot reach them.

Q

Can eneloop be used in underwater lights?

A

Please do not use eneloop Ni-MH batteries in underwater lights or other airtight appliances. Ni-MH batteries feature a gas vent that allows the release of hydrogen when the battery is misused. Gas will not be released under normal usage conditions, but hyper-electric discharge or short circuit can cause internal gas pressure to rise and gas to be expelled. This gas contains hydrogen and sealed devices can’t diffuse the gas, so any source of ignition may potentially cause fire.

Q

Can I use Ni-MH batteries until the appliances completely stop working?

A

It is not recommended as this could lead to over-discharging the batteries which is one of the main causes of shortening the service life of your batteries.
· How about digital cameras which automatically shut down when the battery runs out of capacity? There is no need to worry about over-discharging the batteries. However, if there is a battery indicator, it is recommended to charge the batteries when the indicator shows a remaining capacity level of +-25%.
· How about appliances (e.g. torch lights) which do not shut down when the batteries are low on capacity? It is recommended to charge as soon as possible when there are signs of the appliances not working appropriately or working slowly. Otherwise over-discharging the batteries could occur, which will critically degenerate the batteries’ performance and may seriously damage your batteries.

General

Q

How to recycle batteries?

A

Up to 90% of the materials in Panasonic batteries can be reused, either in the production of new batteries or in other industries. As soon as a battery is no longer fit to use, you should recycle them. In the EU, all stores selling more than 35 kg of batteries annually are obligated to have a recycling point. For more information on how battery recycling is organised in your country, please head to this website

Q

Which appliances are not compatible with Ni-MH rechargeable batteries?

A

Ni-MH rechargeable batteries cannot be used for the appliances mentioned below:
· Waterproof appliances e.g. underwater light source. Ni-MH rechargeable batteries are not compatible due to the danger of the appliances exploding from the gas generated in the case of over-discharged batteries.
· Incompatible appliances. If it is mentioned in the appliance’s manual that Ni-MH rechargeable batteries must not be used under any circumstance.
· Appliances in which the rechargeable batteries do not fit properly due to structural differences in size between the batteries and the terminals. E.g. when there is no contact with either positive or negative terminal, when the battery’s diameter is too wide, etc.
· Appliances with battery indicators. Although they will work, the indicator may show lower remaining capacity than in reality due to the difference in voltage between rechargeable and alkaline batteries.

Q

What is a battery spacer?

A

A size-conversion spacer for AA rechargeable batteries is an extra casing which can temporarily convert your AA batteries to C or D size.
More specifically, you insert an AA size battery into a C or D size type of spacer and temporarily use it for appliances operating on C or D size batteries.
However, please take note of the precautions mentioned below since size and characteristics between the spacer and the original battery are different.
· Do not use spacers continuously as they are meant for temporary use.
· It could be the case that spacers cannot be used due to different characteristics between batteries
· It could be the case that the spacer does not fit in the appliance due to a slight difference in shape between spacer and designated battery
· When needing more than 1 battery, do not mix spacers with rechargeable batteries inserted together with alkaline batteries of the same size.
· When using more than 1 spacer, do not use batteries which are not the same in terms of capacity, brand name, production date or remaining capacity.
· Please only insert a spacer into an appliance when you need to run the appliance. Remove the spacer and store it separately from the inserted battery when you have finished using the appliance
· The operating time of an appliance using a spacer is shorter than that of the same appliance using the correct C or D dry battery.
· Please do not try to charge a battery when it is inserted into a spacer
· Only use rechargeable batteries in spacers and not alkaline batteries

Q

What does mAh mean on rechargeable batteries?

A

The capacity of batteries is indicated as XXXX mAh (milliampere/hour).
The formula for calculation is as follows:
Capacity (milliampere/hour) = discharge (milliampere) x discharging time (hour)
E.g. Take a Ni-MH rechargeable battery with a capacity of 2000 milliampere/hour.
If you insert this battery into an appliance which consumes 100 milliampere current continuously, the operating time of the appliance will be around 20 hours mathematically.
However, this is just a guideline since it varies depending on the performance of the appliance or the conditions it is used in.

Q

What is “memory effect”?

A

If Ni-Cd batteries and nickel-metal hydride batteries are repeatedly charged before the stored energy is used up, the battery “memorizes” the altered, decreased capacity. When you use it after that, the voltage decreases on the way. Sometimes this causes equipment to shut down. This is called the “memory effect”. The voltage of eneloop is higher than that of conventional nickel-metal hydride batteries, so even if the “memory effect” occuers, sufficient voltage is maintained. You can recharge the battery as required without concern about memory effect.

Q

Is there a size difference between dry batteries and eneloop?

A

The dimensions of eneloop batteries are based on IEC (International Electrotechnical Commission) standards, and are therefore suited for use in any IEC-approved appliance. However, in some rare cases, you might be unable to comfortably install the batteries. Don’t force the batteries inside as you might damage the container and cause overheating.

*1 IEC 60086-2
*2 Actual measured value

Q

What is an adapter?

A

An adapter or spacer is a piece of equipment that enables smaller batteries to do the job of larger C and D batteries. Using an adapter, eneloop size AA batteries can power an appliance that requires C or D size batteries. The adapter bears no relation to the battery’s capacity, and can be used in many appliances. However, in some cases the adapter will not reach the contact point of the battery compartment. In this situation, do not use the adapter. The adapter is designed for emergency use, and is not intended as an equivalent alternative for C and D size cells.

Q

What is “refresh function”?

A

This function is to remove memory effect. even if the memory effect occurs, the voltage will recover if it is fully charged and fully discharged. It works by discharging the batteries first and then recharging the batteries to full capacity.

Q

What is the difference between “best before” date and “manufacturing date”?

A

The “best before” date printed on dry batteries refers to the optimal performance guaranteed if you use the battery within this period. This limitation does not apply to eneloop, because nickel-metal hydride batteries can be used anytime if they are electrically charged. For reference, the “manufacturing date” is printed on the package as eneloop batteries are shipped fully charged. Due to the unique low self-discharge feature, if your purchase was within five years of the “manufacturing date”, you can still use them immediately without charging.

Q

What’s the difference between 1.5V and 1.2V?

A

1.5V is the nominal voltage for dry batteries, and nickel-metal hydride batteries (such as eneloop) have a nominal voltage of 1.2V. Dry batteries have a slightly higher voltage than the actual working voltage required by the appliance. Though the nickel-metal hydride battery is 1.2V, nickel-metal hydride batteries are able to provide similar performance to standard dry batteries. Basically, almost all appliances that require a dry battery can also use Ni-MH battery. Please be aware, though, of exceptional cases where only dry batteries can be used.

Under a continuous discharge at 500 mA, 25 ℃

Note: In case of 500 mA discharge

Q

What is the memory effect for rechargeable batteries?

A

The memory effect is an occasional defect, which occurs in Ni-Cd and Ni-MH rechargeable batteries, where the maximum battery voltage decreases even though the original power of the battery remains the same.
In particular, this could occur when batteries are charged whilst still holding some power. This way the battery memorises the fact it hasn’t been used to its maximum capacity, after which the battery’s capacity drops when used the next time despite it being fully charged.
The memory effect doesn’t affect the performance of lighting equipment, electric toys, etc.
However, when batteries with memory effect are used in digital cameras, it could induce a decline in operating time depending on cut-off voltage whereby the camera determines it has no power left.
If the memory effect occurs, discharge the battery by inserting it in a flash light (or something similar) until the battery is completely drained of its power. Then fully recharge the battery to its maximum capacity to bring it back to its original performance.
eneloop is especially designed not to suffer from this memory effect.

Q

Do eneloop batteries (1.2V) in comparison with alkaline batteries (1.5V) work in every battery based appliance?

A

In general, appliances are designed to match the characteristics of dry batteries and to work within the voltage range of 1.5V to 0.9V.
Although the initial voltage of Ni-MH rechargeable batteries is around 1.2V, which is lower than that of an alkaline battery, they are capable of maintaining a steady discharge level at around 1.0V for as long as they hold capacity, while alkaline batteries constantly decrease their output voltage from the moment they are in use.
Thanks to this characteristic, Ni-MH rechargeable batteries can be used in appliances which require alkaline batteries, even with lower initial voltage.

Malfunction

Q

Is it normal for batteries or chargers to heat up during the charging process?

A

Heat generation during charging is not abnormal. However, how much a charger heats up depends on:
· The type of charger that is being used (quick charging versus normal charging)
· Whether or not a protection cover is being used
· The initial capacity of a rechargeable battery
· The remaining capacity of a rechargeable battery
· The degree of degeneration of the battery
· Ohers
Although the surface temperature of batteries could reach 55 degrees Celsius (hot to the touch) while being charged, this will pose no problem. Our eneloop chargers are fitted with functions to stop the charging or control the temperature of the batteries as soon as a possible risk is detected.

Q

What should I do when there is a sizzling noise coming out of the charger during the charging process?

A

This is a vibration noise which occurs when electric current flows through a transformer or a winding wire inside a component part. However, the charger may still be used without any concern as there is no need to worry from a safety point of view.

Q

My equipment does not work. Why?

A

It may be due to the following:

Cause 1: Batteries are not charged
Your eneloop is a rechargeable battery. It is pre-charged when you purchase, but once drained it needs to be recharged in order for you to use it again. In the event your charged battery cannot be used, it’s possible that the batteries were not charged properly or the batteries have discharged because they were kept in use for too long. Try charging them again.

Cause 2: The terminals may not be clean
Touching the battery with your fingers may leave dust or grime on the surface of positive and negative terminals. This causes the electrical resistance on the surface of the electrode to increase, which affects battery performance. If this happens, clean the terminals with a dry cloth.

Cause 3: Battery over-discharged
Appliances without an over-discharge prevention function can sometimes cause batteries to over-discharge. For example, use in a low-current-draw LED light until the battery runs out can cause it to over-discharge, and later the battery won’t recharge correctly. Recharging the battery 2-3 times can remedy this problem, but if it persists, unfortunately your battery’s life is at an end and we recommend seeking a replacement. Continuous over-discharging causes damage to the batteries. We recommend recharging the battery when you see signs of decreased performance, for example when luminous energy becomes low when used an LED light.

Q

What to do when rechargeable batteries heat up while using?

A

When rechargeable batteries are over-discharged with continuous high current, abnormal heat could be generated. If the batteries become excessively hot, stop the appliance immediately from running since it damages the batteries. After spontaneous cooling the batteries will be fit for use again.
When rechargeable batteries generate heat immediately after inserting them into an appliance, there is the possibility that the batteries will short circuit when contact is made with the appliance’s terminals. This could cause the batteries to leak and explode.
If this happens, cover the batteries with a thick cloth immediately and remove them from the appliance quickly without scattering any of the leaking liquids. Then, let the batteries cool naturally in a safe place, after which you should put them in a plastic bag before depositing them into a recycling box at an electrical store.

Q

Why doesn't the appliance work after changing the batteries?

A

There can be several reasons why the appliance doesn't work. In this case we assume that the appliance is working correctly.
· No contact between the battery and the terminal
The size of rechargeable batteries may differ from those of alkaline batteries. This is why appliances, which are generally designed to match the characteristics of alkaline batteries, could have some difficulty in fitting the batteries in. If this is the case,it is recommended to use an alkaline battery.
· One of the batteries is completely discharged
In the case that charged and uncharged batteries are used together, it is recommended to determine which ones need charging using a charger. When it is clear which battery needs charging, make sure it is charged to appropriate capacity levels.
· One of the batteries has degenerated or is completely dead
It could be that a degraded or dead battery is put in an appliance. In this case, it is recommended to replace all of the batteries with new ones.
· Dirt on the terminal
When the appliance terminal is contaminated or oxidised, it is recommended to clean the terminal with a cleaning cloth.

Q

What to do if Ni-MH rechargeable battery leaks?

A

The leaked electrolyte is a strong substance which may cause blindness or strong burning sensations if the liquid makes contact with the eyes or body and is not properly removed.
Therefore it is necessary to immediately take appropriate treatment measures to avoid those risks.
If any leakage touches the eyes or skin, make sure you rinse your eyes or skin with plenty of water and contact your doctor immediately.
If any leakage makes contact with clothes or any kind of furniture, make sure you clean them thoroughly.
A battery which is leaking or has leaked before is not fit for use and should be thrown away. Place the batteries into a plastic bag, without touching the batteries, and then put it into a recycling box at an electrical store.

Q

Why has the operating time of my battery decreased so much?

A

The occurrence of the symptoms below could indicate that your rechargeable batteries need replacing.
· The battery has been used extensively over the last few years and its operating time has started to decrease after charging. As a guideline, if the operating time is cut in half, it is time to replace your rechargeable batteries.
· If the charging of one battery poses a lot of difficulties e.g. when the charging time becomes increasingly longer. E.g. If it takes double the amount of time to charge a battery compared to other batteries of the same type, it is recommended to replace that particular rechargeable battery.
In the cases above, if a dead battery has to be replaced in an appliance, Panasonic urges its customers to replace all batteries in the used appliance to negate the possibility of overcharging the other batteries.
However, in the case of the defects below, the main cause could be an intermittent contact between battery and terminal.
· Battery charge is never completed or takes a large amount of time (guideline: 2 to 3 times longer than normal charging time).
· When the operating time is noticeably short despite having used the battery only a few times. In the cases above, it is recommended to clean the plus and minus terminals of the batteries, and the terminals of the charger with a cleaning cloth.

Q

What could cause leakage in Ni-MH rechargeable batteries?

A

It is generally said that Ni-MH rechargeable batteries hardly leak, unlike alkaline batteries.
However, both alkaline and rechargeable batteries contain electrolyte, which could induce leakage when the batteries are used incorrectly.
There are certain wrongful uses which could cause a sudden rise in battery temperature that generates gas which cannot be absorbed within the battery case:
1. Forcefully discharging the batteries when they’re already over-discharged
2. Really high current discharging can cause a lot of heat and eventually leakage.
3. Short circuit discharging; the battery will become really hot and will eventually start leaking
4. Safety valve: in order to prevent the batteries from exploding, a safety valve is fitted in every battery to discharge the gas. When this gas is being discharged there is a possibility that the electrolyte will leak out.

Q

Why do batteries leak?

A

1. Mixed use: when batteries are used from different manufacturers, different type i.e. (zinc-carbon together with alkaline or others), different grade or a mix between old and new, there is a high risk of over discharging one of the batteries. Due a difference in capacity it is possible that with a mix of batteries as above stated can cause one of the batteries to over discharge, with high risk of leakage of that over discharged battery.
2. Leaving battery in appliance: when batteries are left in an equipment which is not turned off, or left for longer period in an unused appliance, there is a chance that these batteries will run empty and if kept too long in the appliance they might over discharge which has a possibility of leakage as consequence.

Safety

Q

What happens when you swallow a battery?

A

If you or a child has swallowed a battery, immediately head to the nearest emergency room and bring the battery packaging or device if possible.
Take these measures into account:
· Stay calm, but act quickly. Unless the battery is lodged into the esophagus, severe and/or life-theatening effects are less common
· Avoid eating or drinking unless a medical professional has directed otherwise
· Do not force vomiting yourself

Q

Can Ni-MH batteries be used for lights with a wire filament?

A

Ni-MH rechargeable batteries can be used for (torch) lights with a wire filament. Since the initial voltage in alkaline batteries (1.5V) decreases more quickly than in rechargeable batteries (1.2V), torches using Ni-MH will remain brighter for a longer period of time.
However, given the higher initial voltage level of alkaline batteries, these batteries will give a more intense light at the beginning of the service life of the batteries.

Q

I accidentally washed my clothes together with some batteries.

A

Influence on the batteries
Once water enters into a battery, it is very difficult to get it out due to the battery’s safety vent (which doesn’t allow any liquids to leak out of the battery). Therefore, if water enters the cell and is kept around the terminal, it could induce the battery to malfunction. In the worst case, it will result in leakage due to damage to the sealing. It is recommended to immediately dispose of batteries that have made contact with water to prevent the failure of the cells and the subsequent appliances they are used in.
Influence to clothing wear
It is very unlikely that batteries will start to leak in a washing machine.
If this does occur and liquid leaks out of a battery due to it ending up in a washing machine, it will not cause any serious issue because the liquid becomes greatly diluted in all of the water from the washing machine. However, it is highly recommended to wash the clothing again in fresh water.