Quick view HTC One M9 Battery for Cellular Phone HTC One M9 Battery for Cellular Phone Voltage: 3.8 Volts Capacity: 2840mAh Chemistry: Li-Poly - Lithium Polymer Dimensions: L 3.62" x W 2.48" x H 0.157" Replacement... MSRP: Was: Now: $26.00 Add to Cart Compare