Compatible With:Polaris X3 Sanding Reed Handbook.
Battery Specifications:Voltage:3.7V,Capacity:4200mAh/15.54Wh,Size:77.35 x 49.90 x 12.70mm,Weight:135g /4.76 ozg.
Charges quickly and has low consumption, remaining stable even after long-term use.
For the first use, please fully charge to activate the battery.