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USB pen recorder battery

vanquishfist

Jan 25, 2012
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Jan 25, 2012
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I have a usb pen voice recorder I bought a while back on ebay and it worked great till the battery stopped holding a charge. No matter how long it's plugged into the computer it shuts down a few seconds after it's unplugged.

I took it apart and found the battery but I have no idea what to replace it with. I googled the numbers on it but didn't come up with anything.

Here's a picture if that helps. Thank you for any help!
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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25,510
Probably a custom part. :(
 

vanquishfist

Jan 25, 2012
5
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Jan 25, 2012
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Drat. Is there way I can find out what kind of voltage it needs to be to put anything in there? I don't really care if I can't put it in the original case; I just want to get it working.
 

Resqueline

Jul 31, 2009
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It's a 3.7V Prismatic Lithium-ion battery, 250mAh it seems. They're also known as Li-Po, Li-Poly, or Lithium-Polymer batteries.
It's very long & narrow but given your roomy requirements I'm sure you can find something to replace it with, perhaps on eBay.
You'll find similar varieties in small mp3 players and micro-helicopters for example.
You have to be very careful when replacing it since you'll be soldering directly on a live power source - that can be damaged, and do damage.
There's not much room around the solder points, and if the battery isn't shorted (& damaged) then it can damage the circuit, if you slip.
 
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(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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Assuming they fit, it looks reasonable. Having flying leads means there's less chance of overheating the battery.

Be very careful you don't accidentally short them out.
 

Resqueline

Jul 31, 2009
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Looks like a good deal. It also has protection circuitry - like it seems that your original battery has too. I'm not sure if the circuit will survive a short though.
It's quite impressive that you can draw over 6A from those little things btw..
 
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