DIY Makita BL1830 BL1840 BL1860 BL1845 Electronic Drill Li ion Battery 18v 4AH 5AH 4.2AH Japan or Korea 18650 cells|li-ion battery|battery 18vcell 18650 - AliExpress
18V 3Ah 4Ah 5Ah 6Ah Li ion Battery Rechargable Battery for Makita 18V Battery BL1840 BL1850 Power Tool with LED Indicator|Voltage Regulators/Stabilizers| - AliExpress
Makita 18-Volt LXT Lithium-Ion High Capacity Battery Pack 4.0Ah with Fuel Gauge and Charger Starter Kit BL1840BDC1 - The Home Depot