I have some dynohub powered lights (old Lumotec Ovals, now out of production), one USB charger (Sinewave Revolution) and two lights that also have the USB charger built in (Luxos U and AXA Luxx 70 Plus).
Of all of those, the Luxos U is my favorite in part because it has the pass through cache battery. But if my Luxos U stopped working soon after the warranty expires, considering how much it costs I would be pretty angry. Something that expensive should not be treated like an expendable item.
Originally Posted by
Rob_E
Given that mine is out of warranty, that is my plan as well. But if/when it does completely fail, I think my plan will be to avoid combined devices in the future. The light with the built in USB charger was slightly cheaper than a good dynamo light and a separate USB charger, but now if I have to replace one, I have to replace both, so it may not be cheaper in the long run.
If you are lucky, only part of your Luxos U would stop functioning. For example if the USB portion failed and the light still worked you could wire in a USB charger in a parallel circuit while continuing to use the light.