Amazon.com: Enegitech 18V 4.0Ah Replacement Battery Lithium-ion 2 Pack BL1840B, Replace for BL1850B BL1860 BL1840 : Tools & Home Improvement
Eagglew BL1860B Replacement Battery Lithium ion 6.0Ah 18V Compatible with Makita 18 Volt BatteryBL1860 BL1850 BL1840 BL1820 BL1815B LXT400 with LED Indicator Cordless Power Tools 2Pack - - Amazon.com
Amazon.com: Ryobi 18-Volt Lithium + HP High Capacity 9.0 Ah Battery : Tools & Home Improvement
Einhell Power X-Change PLUS 18-Volt Lithium-Ion Compact Battery, 2.6-Ah - - Amazon.com