text: In case of an imminent power loss, strive to shut down the system cleanly, without triggering 
  the data dump procedure. This process preserves battery charges for actual emergencies. 
  
  When the AC power is restored after a power outage that causes both canisters to save their 
  critical data, the system restarts only when the batteries have sufficient charge to power both 
  canisters for the duration of saving the critical data again. 