It works in a similar way to 'stay alive' or capacitors which are available from other manufacturers. Use the HM7070 can be connected into the current range of HM7000 DCC Bluetooth decoders and sound decoders.
Hornby R7377 HM7070 Power Bank
Hornby R7377 HM7070 Power Bank for HM7000 DCC Decoders
Hornby R7377 HM7070 Power Bank Pack
