Batteries, accumulators, battery chargers for accumulators, safety switchgear apparatus for power network failures, installations for power supply, in particular central battery installations for continuous provision of battery power, group supply systems comprised primarily of accumulators and control units and also of connectors for electrical circuits, battery installations for uninterruptible power supplies

Maintenance and repair of batteries and accumulators, safety switching apparatus for power network failures, installations for power supply, in particular central battery installations for continuous provision of battery power, group supply systems composed primarily of accumulators and control units and also of connectors for electrical circuits, battery installations for uninterruptible power supply