Ok I bought the 1750 battery and the first day of use of it not impressed not any longer than factory battery. Second day of use with a bump charge as well I got 12 hours with lots of calls emails text and music. Today right now fair amount of texting emails and calls and on while I slept I'm 16 hours of of total up time and at 18 percent charge. Its starting to last longer now than the other battery takes a few charges I guess BTW anyone bought this HTC Droid Incredible Desktop Sync and Charge Cradle when in the hell do you know the spare battery is fully charged/ the blue and green lights just stay on all the time when plugged into ac or just one light when you use usb for charge on your computer. It didnt come with directions I dont know if its a quick charger on spare batter or trickle.