Can I Trickle Charge An AGM Battery?

What happens if you charge an AGM battery with normal charger?

You can use your regular battery charger on AGM or gel cell batteries.


These batteries like to be charged slow and low.

Many AGM/gel cell battery chargers have microprocessors that collect information from the battery and adjust the current and voltage accordingly..

What voltage should I charge my AGM battery?

Deep Cycle AGM:- AGM batteries should be charged using a charger with a mode switch for AGM type batteries. It is recommended to use a charger, current limited to 20% or 0.2C of the batteries capacity at a charging voltage of between 14.6 – 14.8V following deep cycle use, or 13.6V – 13.8V for standby use.

What should a 12 volt AGM battery read when fully charged?

Voltage on a fully charged battery will read 2.12 to 2.15 volts per cell, or 12.7 volts for a 12 volt battery. At 50% the reading will be 2.03 VPC (Volts Per Cell), and at 0% will be 1.75 VPC or less. Specific gravity will be about 1.265 for a fully charged cell, and 1.13 or less for a totally discharged cell.

Can you jump start a AGM battery?

Yes, you can jump start the car with an AGM installed. The battery may not charge on the alternator, so when you stop, it still won’t start again.

What is the difference between an AGM battery and a standard battery?

The main difference between gel and AGM batteries is the charge rates. AGM batteries can handle higher charge and discharge rates than gel batteries. Gel batteries are the most costly of the VRLA batteries, but excellent candidates for projects that need a very slow deep discharge.

Can you overcharge an AGM battery?

Do not overcharge the AGM battery Maintaining the performance of your AGM battery demands correct charging. The internal structures of your AGM battery can be damaged due to overcharging. Likewise, the lifespan of your AGM battery can be reduced due to undercharging.

How many years do AGM batteries last?

We can generally say an AGM battery can last two to three times as long as a flooded battery. In the commuter car example we referenced, if a flooded battery lasts three to five years, an AGM battery could last six to ten years or longer.

How much can you discharge AGM battery?

75-80% DOD is the maximum safe discharge for flooded and AGM batteries. Do not discharge flooded batteries >80%. This will damage (or kill) the battery. Recommend operating DOD for flooded batteries is 50% to 75% of capacity.

How do you tell if a 12 volt battery is fully charged?

When the battery is not being charged and not delivering charge to a load, this is the rule of thumb. For a 12 volt, leadacid battery, the voltage measured between these two points should be between 11 and 13 volts. The closer the voltage is to 13 volts, the closer the battery is to being fully charged.

At what voltage is a 12 volt battery considered dead?

This is called the “open-cell” or “resting” voltage of the battery. Resting fully charged 12-volt batteries are around 12.8-12.9 volts, and flat dead ones are at 12.0 volts, so 12.4 volts on a resting battery means it’s about 50% charged.

How often should I charge my AGM battery?

While regular lead acid batteries need a topping charge every six months to prevent the buildup of sulfation, AGM batteries are less prone to sulfation and can sit in storage for longer before a charge becomes necessary. The battery stands up well to low temperatures and has a low self-discharge.

Is an AGM battery worth it?

Since there is no free liquid and minimal gassing, AGM batteries can perform better than flooded batteries in applications where maintenance is difficult to perform. Cons: Users should take care when charging this battery as over and under charging can affect their life and performance.

Will an alternator charge an AGM battery?

If your battery is discharged to the point where it cannot start your vehicle, use a charger as soon as possible to make sure your battery gets fully charged. An alternator is meant to maintain a battery, not charge it. … Under normal conditions most 12-volt automatic battery chargers will work on an AGM battery.

Is 11.9 volts enough to start a car?

However, in practice, the normal voltage for most of the passenger cars can be in the range of 12.2-12.49V, which indicates an incomplete charge. A decrease in performance and the quality of the device begins in the case of reduction to 11.9V or less.

Do AGM batteries need a special charger?

AGM batteries do NOT require a special charger. However, LIKE ANY OTHER BATTERY, it will benefit from the ministrations of a quality “smart” charger. A regular ol’ constant voltage charger, such as you’d buy at the local auto parts store, feeds out power at around 12.7v (some are 12.6v, and some are 12.8v).

Can I recharge a flat AGM battery?

An AGM Battery is “dead”. It will not recharge using a standard battery charger.

How do I know if my AGM battery is bad?

Allow a few seconds for the voltage reading to be displayed on your meter. If the voltage reads a full 12 volts or slightly more, your battery is healthy. However, if the voltage reads 10.5 volts or less, then your battery has either a bad cell or two cells shorted together.

What is the maximum charging voltage for a 12 volt AGM battery?

The target voltage for a 12 volt charger for AGM or some flooded batteries is 2.4 to 2.45 volts per cell, which is 14.4 to 14.7 volts. Some flooded cells will tolerate over 15 volts.