Then multiply that capacity by 0.6 which is the standard reserve capacity. You can easily find this info by looking at the manufactures specs. Before determining the battery charging time, you have to determine the capacity. For example, 10 A is considered as slow charging while 20A and above is considered an as fast charge.įast charge is not recommended because it reduces the lifespan of a battery. On top of that, you should consider charging your batteries at a slow charge rate. So if you feel that the battery is hot when you touch it, then you have quit. You should not continue charging a battery that is overheating. It will take 12 or more hours to charge a battery that has been severely discharged. Also if your battery is much discharged then it will take more time than the one that is a little discharged. How long does it take to charge a battery charging time?īatteries have different charging times because they hold different power. So it takes 13 hours to charge a 120 Ah battery to a 100% on a 13A current. However, since there must be about 40% loss when charging we need to replace it by following these steps. So our charging time will be 120 / 13 = 9.23 Hrs. However, because of some losses we are not going to use 12 but 13 or 14. So our charging current will be, 120 Ah x (10/100)?=12 Amperes. The first step is to calculate the charging current. Let’s use the following formula.Ĭharging time = Battery Ah /Charging current. Let's look at an example by calculating the battery charging time of a lead-acid battery. They come pre-loaded with a BMS that displays the charge time automatically on your screen. For example laptops, phones, and even some cars. Note that some devices have inbuilt battery charging time calculators that make the work easy. You are only required to have some specific values for your battery such as the battery capacity and charge rate current.
Charge time calc free#
Besides that, some websites offer a quick solution to this by providing you with a free battery charging calculator. We are going to discuss one of the simplest formulae that you can use. Some formulas aid in calculating battery charging time.
How do you calculate the battery charging time?Ĭalculating battery charging time is easy. Battery charge time refers to the total time a battery takes before charging fully. Other factors can affect the charging rate of the battery.įor instance, if you use the wrong charger then it might take you some extra hours than the normal to charge the same battery. But the problem is batteries have different charge times making it difficult for us to guess. For this reason, every detail such as charge time is very important because they help us plan. We need them to power our gadgets such as phones, laptops, watches, cars, and even houses.
Batteries are very essential in our everyday survival.
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