AGM technology in the Bosch S5 AGM battery:

For passenger cars with start/stop system and braking energy recuperation

In batteries with AGM (Absorbent Glass Mat) technology, special mats of very thin glass fibers lie tightly between the lead plates of the battery and hold all the electrolyte. The high contact pressure minimizes the loss of active material with an extremely low internal resistance. The faster reaction between the electrolyte and the plate material allows the passage of a greater quantity of energy in demanding situations.
 
AGM technology: Top-of-the-range power for a peak performance

AGM (Absorbent Glass Mat) is one of the latest top-of-the range battery technologies. Here, the electrolyte is held completely in an absorbent mat of very thin glass fibers, allowing larger quantities of energy to pass through.
 
Bosch batteries at a glance: Suitable for all systems

If battery replacement is needed, it is important to install AGM batteries again in passenger cars that were fitted with this type of battery when new. Otherwise, the function and positive effects of the start/stop system would be impaired. The battery service life would also be reduced.