A fully charged LiPo cell is 4.2V.  It would seem yours is overcharged.  It may 
still work for a while, but the capacity and lifetime have been compromised.  
You should probably replace it.

Joe

Sent from my iPad

On Sep 10, 2013, at 3:46 PM, Peter Hackett <peter.hack...@cal.berkeley.edu> 
wrote:

> I just charged my TeleMetrum battery and I noticed that the
> battery (silver wrapper) is bulging. 
> 
> How bad is this?
> 
> It seems to be "working" and the TeleMetrum can talk to my
> laptop. The software reports the battery voltage at 4.46 volts.
> 
> Is this a "normal" voltage for after a charge?
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