![]() ![]() The upper limit for all types of lead acid batteries, including AGMs, is 40 degrees Celsius or 104 degrees Fahrenheit. When charging an AGM battery, pay close attention to the acceptable temperature range for charging. One of the most important considerations when it comes to how to charge an AGM deep cycle battery is that you should overcharge them to give them a “top off.” If you invest in a smart AGM charger, it does this for you-you’ll never have to worry about an incomplete charge. While lithium batteries like those commonly found in laptops can be charged partially without doing harm to the battery, the same can’t be said for AGM models. AGM batteries contain lead acid and require special charging procedures. Understand how charges for AGM batteries are different from traditional lithium batteriesĪGM batteries have much different requirements compared to other batteries, such as lithium ion batteries. Chargers that allow for AGM charging are labeled for that purpose to maintain top performance and protect the battery from overcharge, undercharge and cell balancing. The process is slower than with a wet battery, so the voltage is lower to allow the process to complete without heating the battery too much and causing damage. When the battery is charging or discharging, the acid moves to or from the positive plate. The manufacturer of your particular battery probably has a specification and guide sheet to set some specific rules and guidelines. When charging, remember that AGM batteries must not be charged over 14.8 volts in most cases. The best way to charge an AGM battery is with a charger designed for that specific purpose. ![]() Many people wonder how to charge an AGM battery the right way. If you’re wondering how to charge an AGM deep cycle battery, read on to get to know some of the best charging practices to ensure your battery enjoys a long service life. ![]() If you don’t properly charge your AGM batteries the right way, however, they can prematurely age and die out much faster than they should. You can find a lot of information regarding charging on the datasheet of your battery.How Do I Charge an AGM Battery Correctly? Aug10:50 pm Published by Writer Leave your thoughtsĪGM batteries are ideal for a wide range of uses, from powering your electronic devices and cars to providing backup power to your UPS. With the knowledge above it is obvious that a well-considered choice of your battery charger will extend the lifetime of your battery. Consideration which battery charger to choose Each stage has its own specific values adjusted to the type, capacity and the use of the battery. After these two stages, you can top the battery with a trickle charge. CC/CV stands for the two main charging phases constant current and constant voltage. A VRLA battery is charged following the CC/CV charging regime. A wrong charger can damage the battery and in some cases even itself. Therefore it is necessary to choose a VRLA battery charger for a VRLA battery. Every chemistry has its own specific charging regime. Always consult the information on the label of the battery and the related datasheet. Gel batteries have a lower charge voltage than AGM batteries (Absorbing Glass Material). Batteries used for standby applications have a lower charge voltage than batteries for cyclic applications. Therefore it is important not to leave the battery charger on a high voltage when the battery is getting full. However, electrolysis of water, which is a component of the electrolyte, takes place at 2.3V per cell. Decent charging requires approximately 2.4V. Charging 2V batteriesĬharging a battery with 2V per cell will never result in a full battery. The charge voltage must be compensated if the environmental temperature deviates from 25✬. A 12V AGM battery consists of 6 cells, connected in series.Īnd finally, temperature has a major influence on the performance of a battery. Each cell of a AGM battery has a nominal voltage of 2V. The charge voltage is a different figure to pay attention to. The internal structure of the battery and the chemistry will get damaged and the battery loses capacity permanently. Exceeding this threshold may heat up the battery. For a VRLA battery, the maximum charge current is 0.3CA, meaning 0.3 times the capacity of the battery. The charge current for any battery is limited. In order to choose the right charger for your battery, it is important to understand the characteristics of an AGM battery. We often see that there is no good match between the lead-acid battery charger and the battery, having a negative influence on the performance of the battery and its life time. pbq has over 10+ years of experience in valve regulated lead-acid batteries. Choosing the wrong charger can cause direct or indirect damage to the battery and shorten its lifetime. Correct charging makes the difference, although the influence is often underestimated, selecting the right charger is half the joy. ![]()
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