A power supply including: a reserve power source for providing power, the reserve power source including: a liquid reserve battery which requires activation to produce power an activator having a liquid electrolyte for activating the liquid reserve battery upon a mechanical activation such that the liquid electrolyte is forced from the activator into the liquid reserve battery through a communication between the activator and the liquid reserve battery a pair of terminals operatively connected to the liquid reserve battery for outputting the produced power and a mechanical stop for preventing the activator from activating the liquid reserve battery, the stop being selectively removable when activation is desired. Where the activator includes a container having the liquid electrolyte contained therein and the activator further includes: a top and a bellow attached on one end to the top and to a portion of the liquid reserve battery at an other end.
