4 cell 14.8V Li-Polymer 10000mAh (7872196) battery pack.Internal 14.8V PCB for battery protection; over-charging cut-off17.4Vover-discharging cut-off9.6V Continuous discharge rate5ampsMaximum discharge rate 6.5 Amps.Maximum charging rate2Amps Dimensions203mm x 80mm x 30mm Weight:920 gramsRecommended charger:Universal Li-ion / Li-polymer Smart Charger (about 20 hours charging time) or Smart TB6 Balance Charger (about 5 hours charging time)to charge this battery pack. CautionImproper use like overcharging and over discharging can cause explosion and/or fire.User of the battery is required tohave the sufficient Li-polymer charging experience and technical knowledge. Tenergy or All-Battery.com are not responsible for any damage or injury caused by misuse, misunderstanding or abuse of this product.