I just wanted to warn about the piece of $h1t Seidio 1750 battery for the thunderbolt. I recently got this only for the fact that it was 25% off and free shipping. Had a Seidio batt for my Eris before this and it did help a bit on battery life. This one however has not at all. Not only did it not help it has lasted less than 8 hrs per charge. I was getting 14hr + out of the stock battery with tiamats kernel undervolted -.50. I have tried every calibration, battery wipe, charge and drain, can think of. I will give Seidio one opportunity to call this one a dud and try one replacement but so far it is terrible.