I purchased one of these just under a year ago and it worked pretty well in my PPC6700 for a few months but then wouldn't hold a charge very long. I recently purchased another one and my phone won't even boot with it. It just continuously reboots. I had a replacement sent to me and it does the same thing. The original battery, and the replacement I received a year ago still boot up and charge so I don't believe it is the phone or the charger.