Powerextra& trade; Makita 18v 4500mAh Cordless Tool Rechargeable Battery for Makita 1830 194205-3 194309-1 BL1815 BL1830 LXT400 The only Authorized Dealer of the enhanced version of Makita 1830 battery in Amazon Charging at any time will have no effect on the battery,made with high quality LG 18650 Cells Central Processing Unit (CPU): Analyzes data from the battery's memory chip Built-in shock absorbing features protect the battery Sixteen firm holding contact terminals reduce the risk of power loss/fluctuation