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General E46 Forum
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Old 01-23-2015, 06:03 AM   #1
Javado
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Can i refill this battery?

So i was wondering if i could refill this bosch silver battery or it is dry-charged?
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Old 01-23-2015, 08:58 AM   #2
dmarkle
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No. It's sealed. Batteries don't die because they dry out, they die because the electrodes become irreversibly eroded. If you were to open up the battery, you would likely see white powder inside the case - that's electrode that's been worn away.
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Old 01-23-2015, 10:53 AM   #3
Solidjake
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Looks like an AGM battery due to it being sealed. Try to google and see if a slow amp battery tender charges those batteries, if so you MIGHT be able to get it charged up but as to how long it will hold charge/last is unknown.
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