Amazon.com: Topbatt 2 Packs 6.0Ah 18V Li-ion Battery Replacement for Makita 18 Volt Battery Compatible with Makita BL1860B-2 BL1850B BL1840 BL1840B BL1830 BL1815 BL1815B Cordless Power Tools with LED Indicator : Tools
12.0Ah For Makita BL1830 18 Volt LXT Li‑Ion Cordless Battery BL1850 BL1860 9.0AH | eBay
Aftermarket Power Tool Batteries...Are They Worth Buying?? - YouTube
Amazon.co.jp: TOPBATT Compatible Makita 18 V Battery Set of 2 (Actual Capacity 6,000 mAh), Normal Output (50A) BL1860B, Makita Battery, 18 V Makita Battery, BL1830B, BL1850B, BL1860B, Makita Electric Tool Battery, LED