Motorola Droid Razr Maxx HD Cell Phone Battery (Li-Pol 3.8V 3300 mAh) Internal Battery - Replacement For Motorola EV40 Cellphone Battery - Installtion Tools Included (Li-Pol 3.8V 3300 mAh) Internal Battery Replacement For Motorola EV40 Cellphone Battery - Installation Tools Included Made with high quality Japanese cells. 100% compatible with your OEM battery. 1 year warranty