Robust construction

The impact-and shatter-resistant battery case is
composed of ABS plastic and is vibration tested.

VRLA (maintenance-free)
Valve Regulated Lead Acid Battery is a sealed and maintenance-free rechargeable lead battery. This design is not subject to gassing (in contrast to starter batteries of cars) and no liquid must be refilled. The use in an locked room is safe.

AGM (independent of position)
Absorbing Glass Matt means that the absorbing micropore separator of the battery binds the electrolyte and therefore no liquid can leak out, even if the case is damaged.