Minimum Voltage Needed to Charge your Z2
12 volts.
Battery Life
The battery life varies depending on the altitude and pressure set-
ting of the unit. Higher altitudes and higher pressures will use more
battery life.
Temperature can also be a factor. Colder weather will use more
battery life. The battery is designed to be used in temperatures
between 41˚ F and 95˚ F.
Do not charge the battery in temperatures above 80˚F.