Flylinktech Makita 18 Volt 3000mAh Li-ion Replacement Makita Cordless Lithiumion Tool Batteries For Makita 194205-3 LXT400 BL1830 BL1815 (3000mAh(1 Pack)) Replacement Battery on For Makita 194205-3 LXT400 BL1830 BL1815 ,Tested Good !! Cools the battery by forcing cool air through the battery's built-in air vents. high quality power products and excellent customer service Charging at any time will have no effect on the battery.