2Packs Upgraded 5.0Ah 18V Bl1850B With Led Replacement Lithium-Ion Battery For 1?Battery type: Lithium-ion, Voltage: 18V, Capacity: 5000 mAh.Get CE,ROHS UL Certificate. Suitable for Makita 18-volt battery and charger (used with DC18RD DC18SD) 2?Applicable Models? Replace Makita 18V battery BL1860, BL1860B, BL1850, BL1850B, BL1840, BL1840B, BL1830, BL1830B, BL1815, BL1825, BL1835, BL19405, BL19404 Cordless Power Tools Batteries. 3:Battery Protections? Made with high quality battery cells, Built-in protection against overcharge, over-discharge, over-current provides short- circuit protection and constant voltage circuit. 4?LED Charge level indicator: Power display can show remaining power in order to avoid over-charging over-discharging. 5?Professional After-Sale Service 24-hour friendly customer service , Conditional refund or replacement for a new battery if there is any quality problem. Any problem with using the battery, please feel free to contact us.