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3: Battery Level
The TPG includes a built-in battery level indicator that is displayed
on the (1) title screen, and (2) Menu screen. When the title screen is
first displayed, it will take about two seconds for the initial battery
measurement to complement.
The battery level is visualized as a horizontal bar filled with green to
indicate battery health. When battery level is critical, the bar will be near
empty and colored red.
The battery level will be checked periodically while the TPG is powered
on. Access the Menu (by holding down the MODE button), to view the
most recent battery reading.
The battery level is measured by checking the output of the TPG’s +5v
voltage regulator. As the 9volt battery capacity diminishes from use, the
output of this voltage regulator will drop below the n5v. Critical
battery level is reached when the output of the TPG’s voltage regulator
drops below +4.5v. At this point operation will become unstable, and the
9volt battery must be replaced.
