Can anyone please tell me how I would go about changing the battery over in my light please!!! I have so far taken off the lens cover and have undone the 3 x 1.5mm Allen screws to release the outer housing but still can not get to the battery :-( Thankyou
A quick google search turns up this forum entry by user “RNAV”: https://www.bikeforums.net/electronics-lighting-gadgets/1085170-knog-arc-5-5-battery-replacement.html
Remove the trim that surrounds the lens. There are four phillips screws holding the lens in place -- Knog fills these in with epoxy so you can't use them. I dug out the epoxy with a razor blade. Unscrew and remove the lens, and you'll see the LED circuit board. There are three black 1.5mm allen bolts; unscrew these. This loosens the heat shield from the body of the light that holds the battery. Gently slide the heat shield (with the circuit board still attached) forward, and it will reveal the 18650 battery compartment (spring loaded on negative end). Remove / replace battery, and perform steps in reverse to reassemble.
As you can tell, it’s hard to get apart (not intended by the manufacturer) but at least it uses a standard 18650 Li-Ion battery.