Great Planes LiPo 2S 7.4V 250mAh 20C ElectriFly FEATURES: Balancing allows all cells to fully Charge to 4.2V ensuring maximum power from the pack, plus conditions the cells better so they will last INCLUDES: Great Planes ElectriFly Lithium Polymer 250mAh 7.4V 20C Balance Battery Pack with Instruction Sheet REQUIRES: 2S 7.4V AC/DC Micro LiPo Balancing Charger with AC and DC Adapters (GPMM3321), or with Balancing Charger with Car Adapter only (GPMM3322)