Great value hardcase RC car battery with all the advantages of LiPo: High current of 100A constant and minimal voltage drop under load giving maximum performance in any 1/10 class system rated up to 80A. Light weight and fast charge capable for an 80% charge in 30 minutes (8A 80w charger power required). Very similar size to NiMh stick, fits in most RC battery bays, chassis and enclosures however beware of top exit connectors. Zippy Quality Precision engineered resistance matched cells. Achieves full current rating (cheap packs from other brands are usually over-rated, many by as much as 10c). Capacity always higher than specified.  Minimal voltage drop under load (many cheap packs suffer huge voltage drop). Tough outer hardcase specially for RC Cars, Trucks and Buggies, protects the battery from g-force and shock. ------------------------------------------------------------------------------------------------------------- Specs: Capacity - 4000mAh Voltage - 2S1P / 2 Cell / 7.4v Discharge - 25C Constant / 30C Burst Weight - 235g Dimensions - 138x47x23mm (+5mm for cables) Balance Plug - JST-XH Discharge wire: 12awg Max Charge Rate: 2C.