Battery Education Menu
Cylindrical-type batteries include manganese, alkaline and nickel-metal hydride batteries, and due to their compatibility, they can be used with a wide range of equipment. However, a key point when using batteries together is that you should always use the same brand, type, and performance rating.
As shown in the chart below, certain silver-oxide batteries can be used with devices compatible with alkaline button batteries.
Batteries contain chemical substances and so may be damaged by heat or humidity. Be sure to avoid storing batteries in high temperatures, high humidity, or direct sunlight. Such storage conditions would reduce the lifespan of the battery and may lead to ruptures and leakage.
If batteries have been removed from their packaging, store them in plastic or paper bags, ensuring that positive (+) and negative (-) poles never come into contact. When storing batteries in pockets or bags, always keep them separately from keyrings, necklaces, or other metal objects to avoid short-circuiting. (Never store batteries in metal containers either)
Store batteries out of reach of babies and small children. It is said that “92% of accidents where batteries are swallowed involve children aged three or younger.”
Don’t forget to switch off
This is the biggest cause of leakage. If you are not going to use the device for a long period, we recommend removing the batteries.
Replace all batteries together
Using a mix of old batteries and new batteries is dangerous as it may cause them to leak.
Remove batteries as soon as they are all used up
Keeping used batteries in a device may cause them to leak and lead to equipment failure.
Rechargeable batteries should always be recycled
Whether they are Ni-Cd batteries, nickel-metal hydride batteries, or lithium-ion batteries, all rechargeable batteries can be recycled. Take them to your local electronics store. These batteries come under the Law for the Promotion of Utilization of Recycled Resources in Japan.
Insulate the terminals with tape
Failure to do so may result in heat generation and ruptures if batteries with remaining charge come into contact with other metals. Always take the time to insulate your batteries before disposal. Never “throw,” “dismantle,” or “crush” batteries.
Recycle button batteries
Alkaline button batteries, silver-oxide batteries, and zinc-air batteries can be recycled at your local electronics store.
Check your local regulations for disposing of dry batteries
Recycle or dispose of the battery properly, following your local rules for disposal.
Recommended use-by date for dry batteries
There are no legal stipulations for the disposal of dry batteries, but always follow your local rules for disposal
Specific dry battery display example
These displays designate a recommended use-by date of June 2017. The displays can be found on the body of the battery (base or side), or on the smallest item of packaging (e.g. on the mounting for button batteries or lithium batteries).
This means that “the battery contains absolutely no mercury".
Charge and use the batteries at the same time
For equipment that requires more than two batteries, use batteries that have been charged at the same time. If there is a difference in the remaining capacity, the batteries with lower capacity will get damaged earlier, causing them to leak. We recommend that you write the date of purchase and the name of the equipment that the batteries are used for onto the batteries with a permanent marker and used them grouped together.
Charge the batteries before using them up completely
Using up nickel-metal hydride (NiMH) batteries will apply excessive stress to the batteries and damage them. For rechargeable batteries, not using up all of the battery capacity and charging them with around 1/3-1/4 remaining battery power will enable them to last longer.
Choose the right charger for your batteries
Choose the same manufacturer as your batteries. Choose between “Ni-Cd/nickel-metal hydride dual compatible”, “Ni-Cd only”, or “nickel-metal hydride only”; and between “AA only” or “AA/AAA dual compatible” according to how the batteries are to be used.
Check the charge capacity and features
Think about “how many batteries of which size(s) you will need to charge at once,” and whether you need features such as “charging complete displays” or “fast charging”. If you plan to carry your charger around with you, choose a light, compact model. It is also useful if the power plug can be folded away.
The key point when charging batteries together is that you should always charge the same performance batteries (brand, type, capacity).
Ensure that the positive (+) and negative (-) poles are installed the correct way around.
If you recharge your batteries the wrong way around, they become unusable or even generate heat and rupture.
Pay attention to charging time
Charging times will vary with different chargers. Check the charger’s operating manual. Overcharging batteries will reduce their lifespan.
Pay attention to where batteries are charged
Use a wall socket away from any televisions or radios. This will avoid the risk of interference.
Take care of your charger
Occasionally wipe the positive (+) and negative (-) contacts with a dry cloth to remove any dirt. If the contacts are dirty, it may not be possible to charge the batteries.