Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Service life of AGM batteries
| Index | Explanation |
|---|---|
| 1 | Available capacity [%] |
| 2 | Mileage [thousand km] |
| 3 | AGM battery |
| 4 | Lead-calcium battery |
| 5 | 50 % capacity limit |
In contrast to conventional lead-calcium batteries, the sulfuric acid in a battery with fleece technology is not held freely in the battery housing. Rather, 100% of the sulfuric acid is bound into the mats of the glass-fibre fleece (separators). For this reason, no battery acid can escape if the battery housing is damaged. In addition, the AGM battery is sealed to be airtight. This is possible because the gases are converted back into water by the permeability of the separators.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.