User guide

Security against power failure
If the battery is used, the BEETLE /M system has another important
feature.
When the power fails, the system remains fully functional for a short
period of time. The power needed for further operation is supplied by
the battery.
This means that a system power failure is bridged for a short time.
Because operation is maintained with the aid of the battery, the
application program can be terminated correctly.
The power failure is reported to the application program by the Retail
Device Interface (see chapter Software). The application program then
terminates the program correctly by, for example, closing open files
and writing important information to the non-volatile memory.
The termination of these actions is reported by the Retail Device
Interface. This causes the system to be disconnected, which also
prevents the battery from being discharged unnecessarily.
Peripherals connected to the power output jack of the
POS system are not powered during a power failure.
Battery
GB - 39