AOYAN 18V 5.0Ah Lithium-Ion Battery Replacement with LED Voltage Display and interface of the USB charging for Makita BL1850B BL1850 BL1840 BL1830 BL1820 LXT-400 194204-5 Battery Type: Li-ion / Voltage: 18V / Capacity: 5000mAh. Add a voltage display and power bank function can charge 3.6v ~ 5v things 100% compatible with original Cordless Power tools and chargers,fit for Makita BL1850, BL1840, BL1830, BL1815, BL1835, BL1845, 194205-3, LXT-400 CE certificated. Run safely with over-discharge, overload and short circuit protection. 100% Satisfaction Guarantee, 1 Year Warranty, 30 Days Money Back and 24 Hours Customer Service.