I noticed there is a (going from memory here, so might be slightly off base) a 1750 ma battery (same size as original) and also a 2750 ma battery (that requires a new back). The original is a 1350 ma battery (like I said going off memory so may not be 100%).
So what does the difference in ma's mean in phone time to us laymen? Also, does the phone charger handle the different ma batteries properly without under or over charging them?
Stock charger works fine, ma refers to the amp-hour output, higher number means more juice.
The stock battery is around 1500mah, the ext battery is 1750 I believe. Most users get around 2 hours of extra use from the extended, standby time is obviously more then 2 hours. I haven't had any experience with the seido ext batteries, Ive heard mixed reviews about them. Stick with the Moto Ext Bat, $49.99 from VZW and it includes the slightly thicker battery door.