Amazon.com: Amityke Battery Adapter,Power Wheels Adapter for Makita 18V/14.4V Battery BL1820, BL1830, BL1840, BL1850 with 14 awg Wires Power Convertor for DIY Ride On Truck, Robotics, RC Toys and Work Lights :
2PCS 18V 4.0AH Battery For Makita BL1840 BL1830 BL1815 LXT Lithium Ion Cordless 88381205504 | eBay
Makita USA - Product Details -BL1840
2X Genuine FOR Makita BL1840 18V Lithium-Ion Battery Pack 4.0Ah 18 Volt 1830 NEW 88381430173 | eBay
Makita BL1840B 18V LXT 4.0Ah Lithium Ion Battery for sale online | eBay
6.0Ah Replace for Makita 18V Battery BL1860B, Ultra High Capcaity Compatible with Makita 18 Volt Lithium Battery BL1850 BL1850B BL1840 BL1840B BL1830 BL1830B BL1815B with Battery Holder 2 Pack, Black
Ibanti 2Packs 6000mAh Replacement 18volt Batteries BL1860B Compatible with Makita 18V Lithium Ion Battery BL1815 BL1830 BL1835 BL1840 BL1850 BL1860 Compatible with 18 Volt Power Tools
2Pack For Makita BL1840B-2 18V Volt LXT Lithium Ion Battery BL1830B BL1840 4.0AH BL1850 BL1860 BL1860B BL1850B - Walmart.com
Two Genuine Makita BL1840 18V Lithium-Ion Battery Pack 4.0Ah 18 Volt 1830 - Power Tools | Facebook Marketplace | Facebook