Dunno about Makita batteries, but it seemed Amazon pricing was too good to be true for the Milwaukee FUEL M18 batteries. Best I can tell, you have to pay an arm+leg for genuine FUEL M18's, plus a few fingers or toes if buying a pair. Anything else is likely to be counterfeit. Which is why I'm debating on that high-torque 1/2" impact kit, I don't need another charger, but the 5.0 battery alone is prolly worth the $80 premium over the bare tool.