Amazon.com: Upgraded to 9.0Ah 1 Pack Lithium Ion Battery Replacement for Makita 18V Battery BL1860 BL1830 BL1840 BL1850 BL1850B LXT-400 with LED Indicator Compatible with All Makita 18V Cordless Power Tools :
1820 Makita® 18V Battery Rebuild Service – MTO Battery
1834 Makita® 18V NiMH Battery Rebuild Service – MTO Battery
MAKITA BATTERY REPAIR GOT 2 WORKING AGAIN FOR FREE bl1860 bl1830 BL1840 makita 18v LXT tools - YouTube
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SOLVED: How do I open them and cell replacement - Power Drill - iFixit
18v LXT Battery Repair – Chip Reset By Ryan Flint – April 2013 Introduction The Makita range of battery power too… | Battery repair, Repair, Battery hacks
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