Applicable scope:Suitable for lithium batteries with nominal voltage of 3.7V and full voltage of 4.2V (including 18650,26650,polymer lithium batteries,without limitation on the dimensions) Charging voltage:8.4V - 9.0V Continuous discharge current (upper limit):20A (If the cooling environment is not good,reduce the load current use) Continuous charge current (upper limit):10A Standard Edition:Suitable for starting drills with currents up to 25A below 50W,or resistive loads below 168W. Balanced version:Suitable for starting currents below 25A and below 50W power drills,or resistive loads below 168W,with balanced charging function. Size:4.5x1.5cm/1.77x0.59inch 4.8*2cm/1.89x0.79inch Note: Please allow 1-3mm error due to manual measurement.pls make sure you do not mind before you bid. Due to the difference between different monitors,the picture may not reflect the actual color of the item.Thank you! Package Includes: 1x Lithium Battery 18650 Charger PCB BMS for Protection Board