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Does higher mAH number means larger capacity?

A battery pack mAH rating number defines how much charge the battery pack can hold, higher the mAh number, longer the run time. But battery pack capacity and run time are best defined by watt hours, because 
watt hours number is calculated by multiplying battery voltage (number of cells) with mAH ratings.

A 4400mAH battery pack at 14.4V is 30% more powerful than 4400mAH battery pack rated at 11.1V.

To check battery capacity, use mAH as well as voltage level or just watt hours number.

* There is no difference between batteries rated at 10.8V and 11.1V, same is true for 14.4V and 14.8V battery packs.