Fenix HM75R Manual page 6

charging cable to the USB Type-C port of the battery case.
2. While charging, the indicator in Switch B will display red while charging and will turn green when
fully charged.
3. Once charging is completed, be sure to close the anti-dust cap to maintain the dustproof and
waterproof capabilities.
Power bank function of battery case
1. Open the anti-dust cap to reveal the USB Type-C port and connect the USB Type-C end of the
cable to the USB Type-C port of the battery case.
2. Single click the Switch B to start discharging.
3. With the battery re-inserted, the battery case will automatically begin discharging when
connected to the headlamp.
4. Compatible fast-discharging protocols: PD3.0/PD2.0, QC3.0/QC2.0, FCP, SFCP, PE2.0/PE1.1
Light Load Detection Function*
Turning on/off the light load detection function of battery case
On: With the power bank function switched on, press and hold Switch B for 3 seconds, the battery level
indicator in the switch will blink red three times, indicating that the function is enabled.
Off: With the power bank function switched on, press and hold Switch B for 3 seconds, the battery level
indicator in the switch will blink red eight times, indicating that the function is disabled.
*This function is off by default. With this function switched off, you can use the power extender to charge
low-current digital products such as a fitness tracker.
Note:
1. With the light load detection function switched on, the power extender will automatically stop
discharging when the headlamp is fully charged. Re-insert the Type-C plug and click the Switch B or re-
insert the battery to restart discharging.
2. With the light load detection function switched off, turn off the power bank function of the power
extender when the headlamp is fully charged to prevent unnecessary battery consumption of the power
extender.
Battery Level Indication of Power Bank Function
With the light load detection function switched off: The battery level indicator in the switch blinks green
once a second. If the battery voltage is under 3.2 V, the battery level indicator will blink red.
With the light load detection function switched on: The battery level indicator in the switch blinks green
once every 4 seconds. If the battery voltage is under 3.2 V, the battery level indicator will blink red.
*The battery case will stop discharging if the battery voltage is under 3.0 V.