Powerextra 10 Pack 18v 3000mAh Li-ion Battery for Makita 194205-3 LXT-400 BL1830 BL1815 BL1835 For replacement of Makita BL1830 batteries Charging Technology Controls current, voltage & temperature to maximize battery life Charging at tany ime will have no effect on the battery More power, less weight, and a better fit 30 Day Money Back Satisfaction Guarantee