how to calculate the time remain in a battery(LeadAcid if it matters 12v-7.5AH) with a load(2Amps) connected on it?
Amp Hours (AH) tells you how many amps the battery can sustain for 1 hour until become completely flat.
7.5 AH battery can supply 7.5A for 1 hour and then will be depleted.
Amp Hours / Amps (your load) = Hours the battery will last for.
7.5 / 2 = 3.5 hours.
Thanks a lot you are very helpful person.