The wet battery - also called SLI battery - is the traditional starter battery. The name SLI stands for the three basic tasks:
The wet batteries are divided into the lead-acid battery, calcium battery and the EFB battery. The name wet battery comes from the fact that the acid is additionally diluted with a liquid, which serves as electrolyte.
The EFB battery is an optimization of the normal wet battery. Like the traditional starter battery, the EFB battery contains a liquid electrolyte. EFB stands for Enhanced Flooded Battery, which means "improved flooded battery". Due to its improved performance, the EFB battery is also able to operate vehicles with a start-stop function. In addition, it can better withstand the increased driving demands of city traffic. The EFB battery therefore has almost the same characteristics as the AGM battery. Its additional advantage is that it is less expensive than the AGM battery.
The AGM battery also contains acid. The difference to the normal car battery is that the AGM battery also contains a micro-glass fleece that binds the liquid. The content is therefore leak-proof, vibration-resistant and can also withstand impact damage. This change in the structure gave rise to the name AGM or "absorbent glass matt". The AGM battery has more power compared to a normal starter battery or the EFB battery. It is usually installed in vehicles with many electrical consumers and driving assistants, because they need more energy. It is also ideal for the start-stop function.
The name of the gel battery comes from the fact that the sulfuric acid is connected by silicic acid. This mixture creates a similar consistency and makes the battery leak-proof. The gel battery is known as a particularly robust and low-maintenance battery. The battery is ideally suited for seasonal vehicles or motorcycles.
|Lead-acid battery||EFB Battery||AGM-Battery|
|Suitable for||For vehicles without start-stop system
vehicles without many electrical functions
|Mainly for vehicles with start-stop system
Increased driving requirements (e.g. city traffic)
|Popular for vehicles with start-stop system
Also for motorcycles
Vehicles with a higher number of electrical consumers and driving assistants
Best price-performance ratio
|Can be used as a start-stop battery
More economical than AGM batteries
Less sensitive to heat
|No maintenance required
Longer service life due to reduced wear of the electrodes
Cold start values are high
|Disadvantages||Partly subject to maintenance||More expensive than the normal wet battery||More expensive than the other two starter batteries|
In the automotive sector it is common that a starter battery has 12V. For special oldtimers or also for larger commercial vehicles a higher voltage may be necessary. The most important factors for a car battery are the capacity, the cold start current, the pole arrangement and the correct dimensions.
You should also compare the exact dimensions of the new battery with the old one. Despite the same values in the technical area, the dimensions can be different. In this context, also compare the base strip with which the battery is attached. This should also correspond to the old battery. Basically it can be said that the new car battery should be identical to the starter battery that is already installed in your vehicle. The same type of battery should always be replaced. The brand can be changed.
We would like to invite you to visit our blog entry on the theme worth knowing about the starter battery. Here you will find more details on the use of battery chargers and also on the topic of jump-starting assistance.
When selecting our car batteries, we focus primarily on high quality and long life. Therefore, we recommend the following well-known manufacturers:
By entering the key number / KBA number of your vehicle you will receive an overview of potentially suitable car batteries for your vehicle. These then have to be specified according to the criteria mentioned above and the restrictions in the vehicle data. Should you have any questions, please contact our customer service.