I still do not see why people go buy those ugly extended battery cases and extended batteries, I mean how difficult is it to open the back of the phone and insert a fresh 2600 mah battery into their phone, and keep the phone the size it was meant to be. A spare battery with external battery charger go for like $15, a spare battery in your pocket takes hardly if any space, and how often do you need that extra juice anyways, yes there can be days where you might need it, but not to the extend as to make your phone look like a small whale:icon_eek: on a daily basis. I know myself if I am going to be out without a charging port for a long time, then I will just carry a spare battery in my pocket, for the days that it is not necessary I leave the battery at home, even though I could lug it along "you know those extra .5 ounces might weigh me down":biggrin:.
Some don't want to juggle two batteries, keeping them both charged, having to power off the phone to switch batteries, stressing the back cover, possibly having to take it out of a case and put it back in. I agree that the huge ungainly batteries/backs that are incompatible with cases and holsters are ridiculous, but the ones designed to give a moderate boost while still working with accessories can be acceptable to some.