OHYES for Makita 18v Battery BL1830 18 Volt 3.0 Ah LXT Lithium-Ion battery pack 18V, 3000mAh Real Capacity, Li-ion battery, made with high quality cells. Compatible to Makita BL1850 BL1840 BL1830 LXT-400 194204-5 OHYES products are CE certified, tested by manufacturer to match OEM products. Battery Storage - If you don't plan on using the Power Tool Battery for a month or more, store it in a clean, dry, cool place away from heat and metal objects. Ni-Cd, Ni-MH and Li-ion batteries will self-discharge during storage; remember to recharge the batteries before use. No memory effect. Can be charged or discharged as needed without loss of capacity. OHYES battery enjoys 30 days money back,1 year free exchange.