![]() Thus, 100 Ah / 10 amps is equal to 10 hrs. which can be written as: I(Current)×T(Time)Ī battery’s capacity and current are divided by ten to calculate the battery life measured in hours. In order to see this issue more clearly, let us pretend that the 100 Ah battery has to power a 10 amp load since we know that we can calculate Battery Capacity (BC) by multiplying the current (I) with time (T). It is important to remember that to determine how much capacity a battery has, you must take the current it supplies and multiply it by the duration of discharge. In addition, if we do not know the amount of current it will produce, we cannot determine how long the 100 Ah rated cell will last. You can also consider watts/volts = amps if you have a battery rated in amp hours, and then calculate the time. The basic formula is watts = volts x amps. It is, however, necessary to be realistic, because the duration of the battery with a rated reserve capacity of 100 Ah will depend on the load that it can handle since the rated reserve capacity is only an approximation of the capacity of the battery. Battery life of 100 amps – Theoretically:Īccording to theory, it can only provide 100 amps of current for an hour if it is to provide 100 amperes of current. Battery industry professionals commonly use this metric for comparing batteries, particularly deep cycle batteries. For more information, contact the battery experts at MK battery today.One ampere of electric current can flow one hour of this unit of measure when there are enough charges inside a battery. You don’t want to buy a battery that is short on capacity. Knowing how many amp hours your battery provides is the key to getting a battery that will support you through your daily routine. Meanwhile, the C-100 battery is discharging at a much gentler pace and will be far more efficient. ![]() Thus, when you rapidly discharge a battery with a C-5 rating, you are losing some of its available power just because the battery gets hot. This heat negatively affects the battery’s efficiency. The truth is that rapidly discharging batteries causes them to produce a lot of heat. It would be natural to think that a battery running for 100 hours should provide fewer amp hours than a battery that only runs for five, because the battery must preserve power to make it last. You may be wondering why it is that a battery provides more power when it runs longer, rather than less power. However, if you aren’t sure which C rating to use, it is best to go with the C/20 because it is the middle ground and will give you a general sense of battery performance. Depending on the amount of use you intend to get out of your battery (daily versus sporadically), you will want to compare amp hours for different C ratings. Meanwhile, the same battery may safely provide 36 amp hours for a period of 100 hours. This means that is supplies 26.8 amps in the duration of 5 hours without dropping off. For instance, at C/5 a battery might safely provide 26.8 amp hours. The C rating tells you how many amp hours the battery can provide for a very specific period of time. Most deep cycle batteries will tell you the Ah rating at multiple C ratings. ![]() For large batteries, the rating is abbreviated as Ah. 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). What are Amp Hours?Īmp hour is the rating used to tell consumers how much amperage a battery can provide for exactly one hour. Make sure you’re looking at the right type of battery. If you are unable to find an amp hour rating on the battery you are looking at, it’s probably because you are looking at a starting battery which is not built to provide continuous power in amp hours. If you are looking at deep cycle batteries, the amp hour rating will be clearly displayed on the battery or on the associated sales information. Finding the Amp Hour Ratingīefore you can compare batteries, you first need to know where to look for amp hours on your battery. Fortunately, we have a quick and easy guide to help you understand what amp hours really mean and how to read them when you are battery shopping. As with most things, the calculations that go into battery building are more complex than the average person cares to know. However, while amp hours can tell us about the battery’s capacity, they don’t work exactly the way you might expect. When it comes to judging battery life, one of the most useful tools we can use is the battery’s amp hour rating.
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