Originally Posted by neilmarr
You DO need a full mains charge, Alex. Never rely with a Sony on a USB charge through the PC or laptop, and likewise don't rely on the over-optimistic battery level meter on the device. I had all the problems your facing a couple of years ago before I picked up an AC charger and haven't had the slightest hitch since. Good luck and best wishes. Neil
I have a 650 and I charged it via the USB port as I didn't have a separate charger. The 650 is fine. It's not discharging any sooner then it should. I have an iGo outlet charger with an a97 tip. It seems most cell phone chargers that use the same USB plug may work fine.