FWIW, I just picked up an "OEM" battery from amazon.com, via one of their vendors, ccmaccessories, for $26. Been using it for almost a week and all "seems" well. Getting about the same battery life, 10-18hrs with calendar, and Foreca weather widgets, (3) email clients all updating every hour, WiFi constantly on at 10mW, and about an hour or two "playing".