NOCO Genius BOOST XL GB50 User Manual & Warranty page 6

1.) Internal Battery Level Indicates the charge level of the internal battery.
2.) Error LED Illuminates Red if reverse polarity is detected.
3.) Hot LED Illuminates solid Red; unit is fully operational, but approaching upper temperature limit.
Flashing Red; unit is too hot to jump start, but other functions are still available.
4.) Cold LED Illuminates solid Blue; unit is fully operational, but approaching lower temperature limit.
Flashing Blue; unit is too cold to jump start, but other functions are still available.
5.) Power Button Push to turn unit "On" & "Off".
6.) Power LED Illuminates White when unit is "On".
7.) Boost LED Illuminates White when Boost is active. If the unit is connected properly to a battery, the
GB50 will automatically detect a battery and go into Boost mode (LED flashes White when Manual Overide
feature is active).
8.) Manual Override Button To enable, push and hold for three (3) seconds. WARNING: Disables
safety protection and manually forces Boost "On". Only for use when a battery is too low to
be detected.
9.) Light Mode Button Toggles the ultra-bright LED light through 7 light modes: 100% > 50% > 10%
> SOS > Blink > Strobe > Off