This is the Fat Shark 1.8A High Capacity Headset Battery with LED Power Indicator. The 1.8A pack has improved molded shape to securely fit in head strap pocket. Battery has already integrated balance circuit inside, so no need to connect black/red discharge lead for charging (only for power the fan equipped face plate), just simply use its DC barrel connector and included banana adapter to do lipo charge off standard RC type chargers at maximum 1C (7.4V, 1.8A).
Capacity: 1800mAh (13.3Wh)
Max Charge Rate: 1C
Optional charger capable of Non-balance charging a 2S LiPo
Note: There was a running change and this battery is now internally balanced and no longer has all 3 wires on the balance lead. The center white wire has been omitted.
The "balance lead" is intended to power the fan on equipped goggles such as the Focal V2.
Fat Shark RC Vision Systems 7.4V 1800mAh Battery Pack with LED Indicator FSV1803 is compatible with SPMVR2510