How to disassemble and repair Makita 18V li ion hammer drill BHP451 BDF451 BHP441 BDF441 gear assy - YouTube
Amazon.com: Synergy Digital Power Tool Battery, Works with Makita BHP441 Power Tool, (Li-Ion, 14.4V, 3000 mAh) Ultra High Capacity Battery : Tools & Home Improvement
Makita 419250-0 Forward Reverse Lever BHP343 BHP441 BHP442 B