The OEM Planet Premium 1300mAH Replacement Battery for HTC Inspire 4G, Surround, and Desire HD TheOEMPlanet premium batteries are exclusively available for sale by TheOEMPlanet We pay extra for high quality lithium-ion cells! FREE 1 Year Warranty! If your battery goes dead within 1 year of purchase, we'll replace it for free. Tested to be comparable to the original OEM battery. No extended battery door is required. Battery generally improves after 4-5 charge cycles. Please allow the battery to fully charge and discharge 5 times to enjoy max charge potential