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What Does MAH Mean?

Think of mAh as the size of the gas tank in your car. The bigger the gas tank is the farther you can drive, right. It doesn't make the car go faster, just longer. Same with batteries. A 1000mAH eGo battery will last longer before needing to be recharged than a 650mAh eGo Battery. The 1000mAH has a bigger tank. 650mAh should last approximately 6.5 hours 1000mAh should last approximately 10 hours etc.