mAh - definition
mAh denotes the charge storing capacity of a battery unit which defines Milli Ampere Hour(mAh). In every kind of battery we see this rating. By knowing the battery charge storing capacity we can calculate the back-up time of devices such as mobile phone. The more the number is the more time it can hold the charge for. i.e.: in today’s mobile devices can have the rating such as Li-ion 4000mAh or Li-Po 7000mAh.
