SOLVED: How do I open them and cell replacement - Power Drill - iFixit
Amazon.com: Synergy Digital Power Tool Battery, Compatible with Makita 8433DWFE Power Tool, (Ni-MH, 14.4V, 3000mAh) Ultra High Capacity, Replacement for Makita Battery : Tools & Home Improvement
How to disassemble recent Makita battery packs to salvage cells - YouTube