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Unread 13-01-2011, 14:52
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Alan Anderson Alan Anderson is offline
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Re: good way to keep spare batteries topped off??

Quote:
Originally Posted by ErikRantapaa View Post
Is it OK to charge the batteries in parallel? (I realize it will take longer.)
Don't do it.

If you have taken great care to ensure that two batteries are in exactly the same condition, always being charged and discharged together for their entire lifetime, you can get away with it. If not...don't do it.

Quote:
Are there any safety issues with placing a depleted battery in parallel with fully charged ones?
Yes, there's a big safety issue. The depleted battery will pull current out of the charged ones. Depending on how depleted it is, it can suck a lot of current. Things will get hot. Insulation will melt. Smoke will appear. Fire will burn. Demons will roam the...well, you get the picture.