What does mAh & Wh stand for?

mAh stands for milliamp hour and Wh stands for Watt Hour and it is how a battery's energy storage capacity is measured.

Watt Hour is now the more common way of measuring battery storage since it accounts for both capacity and the voltage and gives a more accurate measure of how long your battery will last.

The higher the rating the higher the energy capacity of your battery and longer the battery cycle.