TaserC2 Battery Power Supply System The Lithium Power Magazine (LPM) is the power supply energy cell system that operates the Taser C2. The C2 uses an LPM, which includes lithium power cells in a single unit. This system powers the TASER C2 for up to 50 30-second firings. When first powered up or (ARMED), the C2 will briefly load the battery for low battery detection. If the "green" light is on, the battery is good. If the "yellow" light comes on, the battery is "bad". The microcontroller then senses the battery voltage and determines whether or not the battery is low or operating in a minimal condition, which is -20C. The LPM should not be stored anywhere that the gold contacts on the top of the LPM can touch any metal objects. If it is short-circuited, the LPM will malfunction and the energy lost during short-circuits will not be registered or tracked in the LPM.