New Capacity Breakthrough.  These battery are slightly thicker than original battery.  Original battery only as 600mah so this is 50% more battery life.  We have personally tested these battery and they last much longer than original battery or the cheap battery that claim to have 800man.   We a so confident in these battery that if you are not happy return it for absolutely free and get full refund back.  1 year limited warranty.

 Comes with screwdriver.