Is it possible to replace AGM start-stop batteries with EFB batteries?

At present, the Japanese car with start-stop system prefers EFB batteries, while the German ones prefer AGM start-stop batteries. The reason is very simple: assuming that the price of an ordinary battery is 400 US dollars, then the EFB of the same capacity is about 800 US dollars, and AGM The retail price of start-stop batteries may be more expensive due to complex technology. To understand whether EFB can replace AGM start-stop batteries, you need to understand the difference between EFB and AGM start-stop batteries.

Here is the content list:

The difference between EFB and AGM start-stop batteries

Is it possible to replace AGM start-stop batteries with EFB batteries?

The difference between EFB and AGM start-stop batteries

EFB:

That is, enhanced flooded battery, EFB battery is based on traditional battery technology, by adjusting the active material formula to improve the battery's deep cycle performance. In addition, the enhanced assembly strength of the internal pole group allows the battery to increase its service life while having stronger seismic performance. Prevent the active material of the battery from falling off, extend the battery's deep-cycle life by more than 2 times, and improve the battery's charge acceptance.

The EFB flooded battery is suitable for installation near the engine compartment (the flooded battery has a filling hole), high temperature resistant, and maintainable. There are more EFB batteries installed in Japanese cars.

AGM start-stop batteries:

AGM means absorbent glass mat,which use the adsorption type glass fiber separator technology. AGM start-stop batteries adopt a lean-liquid design. The plates are not immersed in the electrolyte. Except for a part of the electrolyte inside the plates, most of the electrolyte is adsorbed on the porous glass fiber separator and adopts tight assembly technology. To keep the separator in a certain proportion of the gap, not occupied by the electrolyte, thereby increasing the battery's deep-cycle life (which can reach 3 times that of the ordinary battery) and service life.

AGM start-stop batteries should avoid high temperatures and are suitable for normal temperature environments under the seats and in the trunk. There are more AGM start-stop batteries installed in high-end cars in Europe and America.

Is it possible to replace AGM start-stop batteries with EFB batteries?

Because AGM start-stop batteries adopt a lean-liquid design, EFB is enhanced rich-liquid battery. AGM start-stop batteries have a higher electrolyte density than EFB, resulting in higher voltages than EFB. Under the same voltage, EFB 100% power corresponds to 80% of AGM battery power.

For example, when the battery power of a certain model is lower than 70%, the start-stop function cannot be used (the requirements of each model are different). If the original AGM start-stop batteries are replaced with EFB, the system may detect that the EFB power is lower than 90%. The phenomenon is that the stop function cannot be used normally.

On the technical level, EFB is not allowed to replace AGM start-stop batteries, but there are cases in the market where EFB replaces AGM start-stop batteries. If AGM start-stop batteries are installed in the engine compartment, you can consider replacing AGM start-stop batteries with EFB. However, the computer parameters need to be adjusted, otherwise, the battery life will be short, and the start-stop function may not be available. In the case of very low temperature, it will fail to start.

The battery installation location is not in the engine compartment, and it is strictly forbidden to replace AGM start-stop batteries with EFB.

EFB batteries and AGM start-stop batteries perform their duties and have different characteristics, so Is it not possible to replace AGM start-stop batteries with EFB batteries. If you are in the AGM start-stop battery business, you can consider using our cost-effective products.