The Oight H1R and H2R Head Lamps can augment their internal batteries, when the magnetic charge cable is connected, and charging from a USB power pack, while being used. Extends the run times considerably.
It makes my H1R a long run time, light weight head lamp, when I have my 10k mah power pack in my shirt pocket, and connected to the H1R magnetic charge port.
I believe every Olight light, that utilizes the magnetic charge cable, has this capability.
I have the H1R, H2R, Peron, M2R, M2R Pro, S1RII, S2RII, Seeker2, Seeker2 Pro and can confirm they all function this way.
As long the brightness setting current draw, does not exceed the charging current from the USB power pack, it will charge the light as it is being used. If the brightness setting current draw exceeds charge current, then it may be possible to deplete the light’s internal battery, while charging from a USB power source. But it would still extend the run time considerably, while doing so.
Other USB cable charged lights, may have this capability, but I cannot confirm that.
I believe my BLF SP36 Anduril can do this, using it’s USB C port, but I have yet to confirm it.
I prefer the magnetic cable charger, since it does not damage the charge port, or cable, if the cable is yanked out by accident, or if the light falls while charging.
The one caveat in all of this is, the only Olight that I have, that has this capability WITHOUT REQUIRING an Olight proprietary battery, is the M2R. All the other Olights that I own, are REQUIRED to have an Olight proprietary battery, to utilize this capability.
I have heard the Olight Warrior has a double walled battery tube like the M2R, and can function like the M2R, in this capability. Someone who owns one would have to confirm.