4 cell 14.8V Li-Polymer 5800mAh(7548165 battery pack.Internal 14.8V PCB for battery protection; over-charging cut-off17.4Vover-discharging cut-off9.6V Continuous discharge rate6.1ampsMaximum discharge rate 15 Amps.Maximum charging rate2Amps Dimensions168mm x 55mm x 30mm Weight:495 gramsRecommended charger:Universal Li-ion / Li-polymer Smart Charger (about 12 hours charging time) or Smart TB6 Balance Charger (about 3 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.