Correctly storing rechargable batteries for long periods of time

by on April 21, 2010

Q: What is the best way to store a rechargeable battery for a long period of time?

A: This is a little tricky because all manufacturers have slightly different recommendations for what to do before you store a battery for a long period of time. Most NiMH and NiCD manufacturers suggest you fully charge your battery and then recharge every 3 to 9 months. I personally suggest you fully charge the battery and get on a 6 month schedule. L-ion batteries are a bit more complicated but it seems like most suggest you fully discharge the battery and store it in a cool place. I highly suggest you check with the manufacturer when it comes to L-ion batteries though.

A few things to remember when it comes to rechargeable batteries. The first is to always use a charger made for the battery. If you have a NiMH battery make sure you are using a NiMH charger and if you have a NiCD battery make sure you are using a NiCD charger. The charger should say on the back of it what it supports so please make sure to read it. If it doesn’t say what it supports then I would start to search or buy a new charger.

The most dangerous battery type to recharge is a L-ion/Li-Po battery so always make sure you have the correct charger when dealing with them and always make sure you watch them.

Don’t expect your battery to be fully charged when you go grab it out of storage. Rechargeable batteries lose some of their charge every day and that is the reason you need to put them on the charger every 6 months to make sure that while they are not being used they have a charge in them. So always plan on charging a rechargeable battery before using it if you have stored it for a while.

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