Q: How many amp hours does a battery with a reserve capacity of 120 minutes have?

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Ampere-hours measures the capacity of a battery. How long such a battery at full capacity lasts depends at what rate energy is taken away. 2 Ah can handle a current of 1 A for 2 hours, 0.1 A for 20 hours, etc.

It depends on how much energy what your using calls for. ._.

The letters Wh means watt hours. this is how many hours of power the battery can store. The larger the number, the more power the battery can store. This is important for laptops, smartphones, and tablets. or Another way to measure the capacity of the battery is in watt-hours(wh). wh is calculated by multiplying the number of Amps with the battery voltage.

1955 hours in hours and minutes is 1955 hours 0 minutes.

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Reserve Capacity. The number of minutes a battery can maintain a useful voltage under a 25 amp discharge. Reserve capacity is often a truer test of battery life than amp hours.

Ampere-hours measures the capacity of a battery. How long such a battery at full capacity lasts depends at what rate energy is taken away. 2 Ah can handle a current of 1 A for 2 hours, 0.1 A for 20 hours, etc.

You can do a load test on a battery and compare it to the reserve capacity and cold cranking amps. If it is lower then the ratings then the battery is going bad. Keep in mind that the battery must be charged to its maximum capacity to have an accurate test. Trickle charge on 2 to 6 amps for approx. 6 hours then test battery

ampere hours

That will depend on the capacity of the battery and the amount of electrical loads. could be 15 minutes or a couple of hours.

To charge a rc battery,first find out the battery capacity,Then the out put of the charger. Divide those together and times by 1.5 to get the hours and minutes to charge the battery. Note .15 is 10 minutes.

Sony estimates that the battery charge time is two to six hours for the standard capacity battery, and three to nine hours for the large capacity battery.

mAh = milliamp hours, which is battery capacity

Difficult. The manufacturers of car batteries have become extremely coy about the performance parameters of their products, probably because they don't want to be forced to meet them by a court. However, I would suspect that it would be in the vicinity of 30-40 ampere hours. That means that it can deliver 30-40 amps for one hour, so at a voltage of 13.2 volts, that means 396 - 528 watt-hours, ignoring the fact that the voltage decreases as it discharges. The "Cold cranking" current is a red herring...that is just the current it can supply for a short time, limited by the internal resistance of the battery. <<>> Battery manufactures have gone to a Reserve Capacity rating which is more realistic than using the Amp-Hour rating. Reserve capacity is the number of minutes that a battery can maintain a useful voltage under a 25 ampere discharge at a temperature of 25 degrees C. To maintain a high RC number a battery requires higher quality cell materials. The RC rating of a BXT-65-650 is 130. To convert RCR (Reserve Capacity Rating) to Ampere-Hours at the 25 amp rate, multiply RCR by .4167.

To calculate the battery backup time, you need to divide the battery capacity (7.2Ah) by the load power (25W). In this case, the calculation would be 7.2Ah / 25W = 0.288 hours or approximately 17 minutes. This means that the battery can power a 25W load for approximately 17 minutes.

It depends on the battery's voltage. Such a battery's capacity is given in ampere-hours, not amperes. An 850 amp-hour 12 volt battery can theoretically operate a 12 volt motor for about 12 minutes but in practice it's probably, maybe a lot less, since the motor will probably stop as the battery nears its depletion.

If you mean battery power time remaining... Most laptops will - either in percentage capacity or time remaining. Just place your mouse cursor over the battery symbol on the task-bar.