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Reuse cellphone battery for robotics (discuss.tchncs.de)

submitted 1 year ago by [email protected] to c/[email protected]

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Hi, I found an old cellphone battery (from a Pixel3A phone) and I'd like to reuse it for my robotics experiments. (link to images: https://imgur.com/a/Oj09tai)

2 questions:

how can I trasform the output connection to a more "standard" output connection (ideally V+ and V- wires)
how could I recharge the battery?

Any safety concerns, other than don't poke it? :D

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[–] [email protected] 3 points 1 year ago* (last edited 1 year ago)

Well, for #2, there are excellent modules based on the TP4056 that cost 1$. They charge lithium-ion batteries only. So check the label (yes, I know it clearly says Li-ion but don't trust strangers on the internet for safety facing stuff...), if it says Li-ion, then these are great.

For #1, probably one of those fat traces in the flexible cable is BAT+ and the other is BAT-. I would look for a way to safely remove the plastic coating in such a way that I can't accidentally short circuit it. For example, exposing the copper for BAT+ on one side, and BAT- on the other.