Skil BY8708C-01 Guide D'utilisation page 14

Press the power-indicator button to display the battery pack charge
status.
Battery Charge
Status
≥75%
50% - 75%
25% - 50%
10% - 25%
< 10%
Over voltage
Over temperature
During discharging, the battery pack fuel gauge will show the same
display to indicate the over temperature or over voltage condition.
14
Fuel Gauge
4 LEDs solid green for 10s.
3 LEDs solid green for 10s.
2 LEDs solid green for 10s.
1 LED solid green for 10s.
1 LED flashing red for 10s.
The battery pack is nearly
depleted and needs to be
charged immediately.
4 LEDs flashing red for 10s.
Remove the battery from the
charger or power tools.
4 LEDs solid red for 10s.
Cool the battery pack under
air flow.