Repro:
On QEMU (no battery, debug + tracing on):
[ 41.792342] TRACE: /bin/gui-init(383): show_main_menu
[ 44.722784] TRACE: /etc/gui_functions(167): show_system_info
[ 44.765643] TRACE: /etc/functions(1241): print_battery_charge
[ 44.846725] DEBUG: No battery found in /sys/class/power_supply/
[ 44.899241] TRACE: /etc/functions(1224): print_battery_health
[ 45.009917] DEBUG: No battery found in /sys/class/power_supply/
Battery info not provided under whiptail output.
Info for battery depends on linux kernel enablement. Maybe something missing for t480.
Signed-off-by: Thierry Laurion <insurgo@riseup.net>