LOSONCOER 3200mAh CS-PTK602SL 1ICP4/40/60 1S1P Good Quality Battery For Pocketbook Pro 602/603/612/902/903/912/920 920.W Pro 920 Professional Testing All battery has passed strict quality inspection before shipment: 100% New and O cycle,no memory effect,72 hours aging test,high temperature static,and activate the cell's internal chemical element,ensure the stability of the charging and discharging.So you don't need to activate,charge or use it immediately.