Originally Posted by
corrado33
Something weird is going on. Devices don't care what kind of battery is powering them, as long as they have the required voltage and the battery can deliver the required current. (Not hard to do with these lights.)
Try putting some tin/aluminum foil on one end, just as a test, to make the battery longer. (If you still care that is.)
Alternatively, if you have any other way to charge the battery (another light perhaps?) then charge it first, THEN put it into your nightrider. See what happens then!
If you have an electronic savvy friend, take the battery and light to them, I'm sure it's an easy fix.
Corrado, a month ago I would have agreed with you. But it ain't so. Did you read the thread, 18650's are not standard. They come in different lengths and configurations (button-top and no button top). I've found that bicycle headlights using non-proprietary batteries are the minority; by a long shot. You may be onto something when you say the proper length battery could be charged in another device and work in the NinteRider. But even if that worked it defeats the purpose of an all-in-one USB chargeable battery. Battery access is not easy and it would not be worth the time and energy.
Matt