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Replacing a Li ion battery with 9v's
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Replacing a Li ion battery with 9v's

by ProfOak on Thu Sep 17, 2009 8:07 pm

I have an old Fuji Mp4 player (VM3310 black) that I've decided to dig up and I'm replacing my battery for this reason:

Image Image

As you can see this battery will not work anymore, and is potentially dangerous... I think?

Now there are a few things wrong with it: Headphones jack doesn't work, missing a speaker, other speaker doesn't work (maybe a similar problem for those things) but currently I just want it to power on. I've tried touching wires with a 9v connector (battery connected) and it works, but it doesn't show full battery.

I need to know how to find the right voltage needed to bring it to full before I solder anything. Are there any ways to go about doing that?

Edit: No I did not tape it. Apparently they tape it on the assembly line.
ProfOak
 
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Re: Replacing a Li ion battery with 9v's

by adafruit on Thu Sep 17, 2009 8:42 pm

go buy a replacement 3.6v or 3.7 cell phone battery, the kind that are enclosed, then connect it up so that + and - are wired as they were with the old battery
the old battery is about to leak toxic fluid everywhere. whatever you did (probably charged it wrong) dont do it again.

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Re: Replacing a Li ion battery with 9v's

by ProfOak on Thu Sep 17, 2009 8:53 pm

Actually, I left it in a drawer for a while. When I went for it, it was like that. I'm not sure what happened, but it was probably due to heat. That's about all I can guess.
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Please be positive and constructive with your questions and comments.