USB pen recorder battery

[vanquishfist]

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!

 

[(*steve*)]

Probably a custom part.

 

[vanquishfist]

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]

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.

 

[vanquishfist]

I'll see what I can do. Thanks!

 

[vanquishfist]

http://www.ebay.com/itm/5x-3-7v-25c...S_Batteries&hash=item4cfd541c83#ht_877wt_1163
Something like this? And there's five in case I mess a few up.

 

[(*steve*)]

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]

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..

 

[vanquishfist]

I'll give it a shot, plus I have $1 in ebay bucks to use.