I had the phone for a week and with moderate to heavy use battery lasts about 4 hrs. I got the Motorola extended battery, charged it, and it showed 100% life while on idle for a little over 2 hrs. Original battery is about 10 min before it goes to 90%. I took new battery off charger this morning at 720 am and its 730 pm now and its at 50% with light phone usage, light online usage and my daughter playing angry birds for 30min. Phone is heavier and minimally bulkier but I like it cause it feels better in hand. With original battery it felt like it was gonna fall off my hand. If you havent gotten one, get one now from Verizonwireless.com. Price went from $49 to $25, when I went to check out in the cart.:happy: