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Learning, Sharing, and Teaching => Ask a Mustachian => Topic started by: jeromedawg on August 22, 2018, 06:12:26 PM

Title: Long-term battery storage
Post by: jeromedawg on August 22, 2018, 06:12:26 PM
Hey all,

Besides the obvious of not removing batteries from their original packaging (which, I'm not even sure if that's the best way to store batteries long-term anyway), how do you guys go about storing your batteries for emergencies etc? I've heard taping at least one terminal end isn't a bad idea (with electrical tape) and storing in a non-metal box? What about preventing corrosion when the batteries are in a device that you may not use every day but would want to have around when needed (like a flashlight in a glovebox etc)? Tape the negative terminal end? What about if it's a flashlight requiring multiple batteries stacked on each other - is it enough to tape the last battery-end or would I want to tape each battery end individually?

Curious to hear what you guys do. It gets frustrating especially when you pull something out where the batteries have corroded the terminals and now the entire thing doesn't even work...
Title: Re: Long-term battery storage
Post by: Systems101 on August 22, 2018, 08:12:35 PM
Let's start from the end.  The corrosion is because the battery died, produced hydrogen gas, which ruptured the casing and leaked the internal material (probably potassium carbonate).

To avoid that, you have to avoid having the batteries die.

Batteries die for a few reasons:

So to store batteries, store them in a moderate humidity and between about 50-70 degrees F.

Given that, some comments:

Store them in a cool, reasonable humidity location.  That's about the best you can do.

p.s. For a corroded terminal, if the corrosion is just crystal from the battery and not loss of the metal in the terminal, try a Q-tip and vinegar (with gloves).  The crystal the battery leaks is a base and will be dissolved by the vinegar.