New Replacement 6000mah 18v Bl1830 High Capacity Replacement Li-ion Battery for Makita Charging Technology Controls current, voltage & temperature to maximize battery life. Products are CE certified, tested by manufacturer to match or exceed specifications of OEM products. No memory effect. Can be charged or discharged as needed without loss of capacity. Charging at any time will have no effect on the battery,made with high quality 18650 Cells