Car Battery Amp Hours Explained

The power and longevity of a battery is noted by its Amp Hour Ah rating.

Car battery amp hours explained. How A Car Batterys Capacity Change over the Discharge Period Credit. A 5C rate for this battery would be 500 Amps and a C2 rate would be 50 Amps. Cold Cranking Amps CCA CCA is a rating used in the battery industry to define a batterys ability to start an engine in cold temperatures.

In small batteries such as those used in personal vaporizers or standard AA sized batteries the amp hour rating is usually given in milli-amp hours or mAh. Amp-hours at 12 volts watt-hours 12 volts 1470 12 1225 amp-hours. Similarly an E-rate describes the discharge power.

If you used 10 amps per hour it would last for 10 hours. For instance at C5 a. That means that it will supply over two amps for 20 hours.

An amp-hour -- properly ampere-hour -- is a unit of measure describing electrical charge capacity. For large batteries the rating is abbreviated as Ah. Basically this denotes how long a battery will last if it isnt recharged.

The rating refers to the number of amps a 12-volt battery can deliver at 0F for 30 seconds while maintaining. Approximate amp-hour capacities of some common batteries are given here. 5th and 6th digit can refer sometimes to older battery design and original DIN number 4th and 5th digits The unique code number gives details of endurance level cold cranking performance level.

For a battery with a capacity of 100 Amp-hrs this equates to a discharge current of 100 Amps. A battery should not be discharged at a higher current draw or asked to deliver more amps than its amphour rating divided by 10 in order to get maximum capacity out of it. If a battery is rated as 100Ah it will produce 100 Amps for 1 hour.