Uninterruptible DC power supplies. These devices provide direct current output whether or not there is mains power supply. The battery is connected to the device’s output, so there is no interruption in use when the electricity goes.
The charger is capable of, simultaneously, supplying permanent consumption for use up to the value of its total calibre.
The battery can be NI-CD high-temperature or long-life lead, watertight in both cases, with no maintenance or release of gas.
Signals and alarms with LEDs