I got this to be a secondary replacement for my OEM battery, and the voltage difference alone told me that it won't last as long (1000mAh vs 700mAh) but the price was right.The life of the battery barely comes close to half the OEM one, which was fairly dissapointing to me, but I only use it as a spare. But I would not recommend this battery to REPLACE your OEM one, as you will find yourself glued with your head to the phone with the phone stuck in the wall charger. @_@