Fenix HM75R Manual page 5

1. The headlamp can be operated while charging. The actual brightness of the Turbo output is 1200
lumens in Spotlight mode and 700 lumens in Floodlight mode at a 9 V charging voltage. Only the Low
output and the Med output of each mode can be operated at a 5 V charging voltage.
2. For the first use after connecting to a power resource, the headlamp will flash twice(at a 5 V charging
voltage) or four times(at a 9 V charging voltage) at the Low output in the last selected mode before it
recalls the selected output.
*The above two descriptions still apply when the headlamp is charged by a HM75R power extender,
even if the headlamp battery is inserted backward or not inserted at all.
Battery Level Indication
With the headlamp switched off, single click the electronic switch to check the battery status, the
indicator(s) will last for 3 seconds.
Four lights on: 100% - 80%
Three lights on: 80% - 60%
Two lights on: 60% - 40%
One light on: 40% - 20%
One light flashes: 20% - 1%
*When the headlamp is turned on during charging, the battery level indicators will not function.
Intelligent Overheat Protection
The lamp will accumulate a lot of heat when used at high output levels for extended periods. When the
lamp reaches a temperature of 60°C/140°F or above, it will automatically step down a few lumens to
reduce the temperature. When the temperature drops below 60°C/140°F, the lamp will gradually recall
the preset output level.
Low-voltage Warning
When the voltage level drops below the preset level, the headlamp is programmed to downshift to a
lower brightness level until Low output is reached. When this happens in Low output, one of the
battery level indicators blinks to remind you to recharge or replace the battery.