When using 9V batteries the firing module uses those three 9V batteries to run two separate internal systems. The first battery, indicated by 1P, powers the operation of the module including the transceiver, LEDs, 7-segment display and other circuits. The 2P batteries are used for firing cues. The 1P and 2P run independently of each other and do not necessarily need to be changed out at the same time. The firing module displays “1Lo” or “2Lo” to indicate low battery levels.
2P batteries are replaced less often than the 1P battery due to the low amount of energy required to fire igniters.
When using the COBRA internal LiPo battery, both the 1P and 2P systems are powered by the same single battery and therefore the 1P and 2P values will always be the same. This also applies to the use of external 12-24V power as the 1P and 2P battery levels will always be the same.
For more information on the information on the data displayed when the device is turned on, please see the Startup-Sequence Reference Guide.