Review: Panasonic NCR18650B 3.7V 3400mAh Rechargeable Li-ion Batteries

These are the real deal. I’ve purchased a couple different 18650 batteries from different vendors and these are the only ones that actually last as long as a 3400mAh battery should last. I haven’t empirically tested their battery life, but I can tell you that the batteries that came with a cheapo headlamp I purchased […]