The ‘mAh’ rating marked on a mobile battery and power bank is referred to the battery’s capacity in terms of milliAmpere hour.

AGM Vs Flooded [Wet] Vs Gel Lead-Acid Batteries

The backup time of a 200Ah battery is 2 times that of a 100Ah and 1.5 times that of a 150 Ah battery.

Both Car and UPS batteries are made of the same technologies but you can't replace a Car battery with UPS and vice versa.

full form of ‘Ah’ mentioned on the battery is Ampere-hour and this refers to the capacity of a battery

100Ah is mean that battery is guaranteed to provide a continuous current of 10A over the discharge period of 10 hours (10A x 10h =100Ah)

A 24V battery of the same ‘Ah’ rating as of a 12V store twice power.