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C/20 is the formula most commonly used to describe a battery according to its amp hour rating; for instance a 400Ahr rated battery means that a 20 amp load placed upon the battery delivers at that rate of energy for 20 hours upon reaching the manufacturer's per cell rating, usually about 1.7 volts or 10 volts for a dead, discharged battery. There are different discharge or load ratings such as a 10 hour or 100 hour rating resulting in a different Amp Hour rating for the very same battery. A battery is an electrical potential energy source whose capacity (amount of energy density delivered over time) is determined by the rate/time over which the battery will deliver a set rate of load/discharge. The lesser the load, the longer the rate, the higher the load the shorter the rate.

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Q: How do you calculate battery amp hours?
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Related questions

What is the amp hours on a AAA battery?

1250 milliamp hours.


What is the amp rating for?

Total battery amp hours of the battery, divided by the amp draw, equals the life of the battery.Example=200 amp hours, divided by 5 amps, equals 40.00 hours.There are many different factors. This is based on constant draw.


How do you calculate 24 volt battery life with a continuous 1500 watt draw?

You'll need to know the capacity of the battery. Current requirement for 1500 watt at 24 V is: 1500/24= 62.5 amps. If the battery has 62.5 amp hours it would in theory last one hour. if the battery had something like 80 amp hours, it'd last for about one hour 20 minutes.


What is a amp hour?

It is one amp current used over one hour. A ten amp hour battery can supply 1/2 an amp for 20 hours, 1 amp for 10 hours, etc.


How many hours will 3600 watts last on a 637 amp battery?

7684973343487239485 hours.


Is a 10 amp hour battery better than a 12 amp hour battery?

The 12 amp hour battery will last longer under the same load as a 10 amp hour battery. For example if you had a load drawing 2 amps, the 12 Ahr battery would last 6 hours and the 10 Ahr would last 5 hours under ideal conditions.


How many amp hours is a car battery?

Depends on the battery you buy. They come in different CCA.


What does 8Ahmean on a 12 volt battery?

Amp hours is a battery rating. It means that this battery can sustain 1 amp for 8 hours up to 8 amps for 1 hour. Depending on what the current draw is on the load will determine the length of time the battery will last.


How many hours would a 35 watts tv last on a 12 volt battery?

To answer this question the amp/hours of the battery must be stated.


What is meant by 26 amp hour batteries and how can we calculate the backup time of battery from this?

If you know how many amps your load draws then divide this into 26 and your answer will be the number of hours (approximately) you can sustain the load.


What do amp hr mean on a 12 volt battery?

It is a rating for the capacity of the battery to power a load. A battery rated at 15 amp/hrs has the ability to power a load of 15 amps for 1 hour, or 1 amp for 15 hours, or any combination of the two numbers. Example, 2 amps for 7.5 hours, 3 amps for 5 hours or 5 amps for 3 hours etc.


How is a car battery rated?

Volts, amp hours an cold cranking amps.