A 7ah battery will hold a 1amp draw for 7 hours. With a smaller draw it will last much longer. In this case more than 3 times longer.
1 amp / .3 amps(300mA) * 7 = 23.33 hours to fully discharged.
An 8 Amp hr battery would last approximately 106.67 hours with a 75mA current draw. This is calculated by dividing the battery capacity (in Amp hours) by the current draw (in mA) and converting the result to hours.
Depends on the current draw of what you hook it up to. At a draw of 7 amps (80 watts) it'll last for one hour. At a draw of 1 amp(12 watts) it'll last for 7 hours, ASO.
a car battery last for about 3-5 years
The voltage doesn't enter into the issue.If the current draw of your battery-powered equipment is 1 Ampere, the battery will last 700 years.If your equipment draws 1/2 Ampere, the battery will last 1,400 hours.If your equipment draws 2 Amperes, the battery will last 350 hours.And so on.CorrectionA 700 AH battery will THEORETICALLY last 70 hours at 1 amp current draw. A 700 AH battery will THEORETICALLY last 140 hours at 1/2 amp current draw.A 700 AH battery will THEORETICALLY last 35 hours at 1/2 amp current draw.The theoretical capacity of a battery is always greater than the actual capacity; electrical energy is released in the form of heat inside the battery.
i would recommend a smart charger for your batteries
a panasonic triple a battery last about 4 hours nonstop.
As long as the battery is kept charged then it should last 3-5 years.
about a year.
Forever.
8hrs
No the battery is built in but should last a long time.
A Sanyo phone battery last just about as long as any other battery. Most batteries are manufactured by just a few different manufacturers, and then rebranded.