Battery specs:Configuration: 3 split-cell.Fitted with T-Plug connectorsVoltage: 9.9V.Capacity : 1000mAh.Comes with align balance connector.Dimensions: 25x21x150mm (1,0x0,9x6,0 in.).Size compatible with mini-type batteries.This pack is ideal for M90 to M120 upgrades.Replaces an 8.4V to 9.6V NiMH pack..