Flylinktech 2 Pack Replacement Makita BL1830 Battery 18-Volt 4500mAh Li-ion Lithium-Ion Rechargeable Battery For Makita bl1830 bl1815 bl1835 LXT-400 194205-3 194309-1(4500mAh(2 Pack) New Replacement Battery 18V Li-ion For Makita Battery BL1830 ,Tested Good !! Designed for Makita Battery BL1830,it's has no memory effect. 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.