Amazon.com: TURPOW 7.0Ah Replacement for Makita 18 Volt Battery BL1815 BL1830 BL1840 BL1850 BL1860 194205-3 LXT-400 for Makita 18Volt Batteries LXT Lithium ion Cordless Power Tools with 2 Packs Wall Mount Holder :
Makita 21 in. 18-Volt X2 (36-Volt) LXT Lithium-Ion Cordless Walk Behind Self Propelled Lawn Mower Kit with 4 Batteries (5.0 Ah) XML08PT1 - The Home Depot