This is the factory replacement 3.85V 58mAh high voltage LiPo battery for the HPI Electric Nano-TTR. Rated at 0.2233Wh, it is a compact single-cell pack designed to fit the Nano-TTR's small battery compartment. It includes a pre-installed two-wire connector for straightforward installation. Features: 3.85V high voltage LiPo chemistry 58mAh capacity / 0.2233Wh Pre-wired connector included Compact form factor for micro RC vehicles 7/7/26 cs