Replacement battery fits 7 Flysky compatible models. Specifications: 1600mAh, 3.7V, Li-ion. Compatible with: FS-GT3C, FS-i10, FS-iT4, FS-iT4S, FS-GT2B, FS-GT3B and 1 more compatible models. Replaces: Flysky FS-BA800, Flysky FS-B1700. Flysky replacement battery designed for Remote Controller devices. Built to OEM specifications for reliable performance.