SamP
Guru
I read that when I was investigating bike headlights. Very neat. The 2nd generation of the light (the one I've got) reportedly fixed some of the problems, and then Philips exited the bicycle light business.
I'm thinking of modifying mine to run off an external USB power pack, either by cutting a USB cable and simply wiring the power wires to the battery holder terminals (through a hole drilled in the case) or by repurposing the existing USB jack. 5V and 2.1A should be enough... except my light has a defect, it won't run on NIMH cells. It runs fine on alkaline or the Energizer primary lithium cells, the first has not so good life and the second is expensive. Maybe there's a pot on the logic board to adjust the voltage sensor? I guess I should reread your posts to see how to get to the logic board.
I'm thinking of modifying mine to run off an external USB power pack, either by cutting a USB cable and simply wiring the power wires to the battery holder terminals (through a hole drilled in the case) or by repurposing the existing USB jack. 5V and 2.1A should be enough... except my light has a defect, it won't run on NIMH cells. It runs fine on alkaline or the Energizer primary lithium cells, the first has not so good life and the second is expensive. Maybe there's a pot on the logic board to adjust the voltage sensor? I guess I should reread your posts to see how to get to the logic board.