The Ampere Hour is defined as the number of hours a battery would last if it takes one Ampere of current. So, if a battery has 10 Ampere hour rating, it will last for 10 hours if it takes 1 Amperes of current. A 10 Ampere Hour battery will last 5 hours if it takes 2 Amperes of cuurrent. The Calculator provides how long a battery will last. Here is the formula. Battery Life = Ampere Hours / Current ( Ampere)
http://www.referencedesigner.com/cal/cal_54.php
In an application like that, they could expect to see an OPTIMA battery last up to four years. However, in a more moderate climate, like San Diego, if someone might see four years out of a flooded battery, they could see up to eight out of an OPTIMA. How the batteries are used also impacts performance and lifespan.
https://www.optimabatteries.com/en-us/experience/2013/09/how-long-will-my-car-battery-last
So the rule of thumb is simple for battery replacement: You have approximately four years before the battery will theoretically begin its slide from chemical powerhouse to chemical paperweight. At the four year mark, start watching, and hope your mechanic will detect a problem before it's too late. But due to the nature of the chemical cocktail inside any battery, it may give out before the four year mark, or maybe it will last for several more years.
http://auto.howstuffworks.com/under-the-hood/vehicle-maintenance/often-replace-car-battery.htm
So, if a battery has 10 Ampere hour rating, it will last for 10 hours if it takes 1 Amperes of current. A 10 Ampere Hour battery will last 5 hours if it takes 2 Amperes of cuurrent. The Calculator provides how long a battery will last. Here is the formula. Battery Capacity.
http://www.referencedesigner.com/cal/cal_54.php
While a battery that allows a car start at the first turn of the key is a joyful thing, it doesn't last forever. In fact, depending on where you live and how you drive, the condition of your charging system, and a number of other factors, a battery lasts about four years on average. And when it does give out, there's generally no sign of trouble -- your car just dies. How to Replace a Car Battery.
http://auto.howstuffworks.com/under-the-hood/vehicle-maintenance/often-replace-car-battery.htm
The key to long battery life, regardless of brand, manufacturer or type, is proper voltage maintenance. Fully-charged, our REDTOP® batteries will measure about 12.6-12.8 volts and our YELLOWTOP batteries will measure about 13.0-13.2 volts.
https://www.optimabatteries.com/en-us/experience/2013/09/how-long-will-my-car-battery-last
The answer is not an easy one and it can vary, based on a multitude of different factors. We can safely say OPTIMA® batteries will last up to twice as long as a traditional flooded battery, because we've proven that time and again, both in lab testing, as well as real-world applications. That broad answer does shed some light on how long your battery may last.
https://www.optimabatteries.com/en-us/experience/2013/09/how-long-will-my-car-battery-last
Next, the number of DC Amps must be multiplied by the time in hours that the load is to operate. If the load is to operate for 3 hours: For a 12-Volt battery: 100Amps DC x3 hours = 300 A.H. For. a 24-Volt battery: 50 Amps DC x 3 hours = 150 A.H. Now, theproper typeand amountof batteries mustbeselected.
https://www.batteryweb.com/pdf/inverter_battery_sizing_faq.pdf
While the lead-acid car battery hasn't changed much in the last 100 years, it's still a difficult part of the car to check during routine maintenance. Simple battery testers can't, at this time, muddle through the chemical complexity of what goes on in a battery.
http://auto.howstuffworks.com/under-the-hood/vehicle-maintenance/often-replace-car-battery.htm
Battery capacity is expressed by how many Amps for how many hours a battery will last - Amp-Hour (A.H.) capacity. 3. For a 12-Volt inverter system, each 100 Watts of the inverter load requires approximately 10 DC Amps from the battery. 4.
https://www.batteryweb.com/pdf/inverter_battery_sizing_faq.pdf
how long will my battery last
If a battery has 10 Ampere hour rating, it will last for 10 hours if it takes 1 Amperes of current.