Energy transference for controlled shutdown of marine electronic device

A system for controlling a shutdown of a device, the system comprising:

• a main unit;
• a power input in connection with the main unit, wherein the power input is configured to provide energy to the main unit;
• a secondary unit configured to store energy for a secondary purpose, wherein the secondary unit is connectable to the main unit to provide stored energy to the main unit;
• a processor;
• and
• a memory including computer executable instructions, the computer executable instructions configured to, when executed by the processor, cause the processor to:
• determine whether the power input is providing energy within a predetermined threshold to the main unit;
• and
• in response to a determination that the power input is not providing energy within the predetermined threshold to the main unit, cause the secondary unit to provide at least some of the stored energy to the main unit.