OPTIPOWER ULTRA 50C LITHIUM PACK 4S 4000mAh
4000mAh 14.8v 4S OPTI ULTRA lithium pack.
Rated to 50C with 100C burst. Charge at 1 to 3C for best cycle life.
Cell supplied with tinned 10 AWG silicon bare wires and JST-XH balance connector.
SIZE in mm: L 139 * W 43.5 * T 39. Weight 473g. Weights +/- 5g.