I don't think so. It ran for 4 days and dropped from 100% to 85% before I put the SIM card in it. (I was waiting for the SIM unlock code.) As soon as I unlocked the SIM and connected to the T-Mobile network, then the apps started trying to connect to everything. It dropped from 85% to 25% in a matter of ~3 hours. Ever since then, the battery drops from 100% to <25% in around 12 hours. I've turned on Eco Mode, I've enabled the battery app, I've turned off every application possible... doesn't seem to make much difference. I typically only make 2-3 phone calls a day (the longest being my lunch break; where I spend ~30 minutes on the phone talking with my Bride). It is just baffling how quickly this battery drains, and it is all due to the background crap that I can't turn off.