Samsung Galaxy S II SGH-i777 Extended Battery and Battery Door - Black
The most indispensable accessory for your AT&T Samsung Galaxy S II i777 is the battery. Unless you are in need of a paper weight, even the most advanced phone is useless without power. Now you can extend your talk time even further with the Samsung Galaxy S II i777 Extended Battery and Battery Door. Keep your AT&T Samsung Galaxy S II smartphone working at optimum performance levels at all times.