What does the mAh mean in lithium-ion batteries?Updated 2 hours ago

mAh stands for "milliamp-hour" - it's a measure of the battery's total energy capacity over time, not just current. The higher the mAh rating, the longer the runtime before you need to recharge. It's important to use the correct size battery for your light - for example, most flashlights that take 21700 batteries won't fit or work correctly with 26650 batteries, due to the size difference.