Powerextra High Capacity 4500mAh for Makita 18v Battery BL1830 BL1815 194205-3 194309-1 LXT400 Charging Technology Controls current, voltage & temperature to maximize battery life Charging at any time will have no effect on the battery,made with high quality LG 18650 Cells New Replacement Battery 18V 4.5mAh Li-ion For Makita Battery BL1830 ,Tested Good !! Cools the battery by forcing cool air through the battery's built-in air vents. 1 pair of gloves contained to prevent your hands from dirty.