Factory Customized Power Tool Replacement Battery for Makita Power Tools 18V 5ah Bl1850 - China Replacement Battery, Power Tools Battery | Made-in-China.com
2) New Genuine Makita Brand BL1850B-2 18V Batteries 5.0 AH LED 18 Volt LXT 88381463928 | eBay
Makita 18V LXT Lithium-Ion High Capacity Battery Pack 5.0 Ah with LED Charge Level Indicator (2-Pack) BL1850B-2 - The Home Depot