| CPC H02J 9/06 (2013.01) [G06F 1/30 (2013.01)] | 20 Claims | 

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               1. A mobile unit, comprising: 
            a number of electronic devices including a processor, a number of loads, and a modem; and a circuit board including: 
              the processor; 
                  power reset logic configured to reset at least one of: the processor; at least one load of the number of loads, or the modem responsive to receipt of a reset signal; 
                  a power switch-over circuit coupled to the processor and the power reset logic and configured to switch power to at least some of the number of electronic devices from a primary battery to a secondary battery or from the secondary battery to the primary battery; and 
                  a charge controller coupled to the secondary battery and configured to limit an amount of current conveyed to the secondary battery. 
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