Dinotte is a class act. As mentioned above, they repair any light that goes bad. Actually, they'll even repair it after the user botches the repair. You know how I know, so don't ask.

We do lots of night rides and I absolutely adore my 400R Dinotte tail light. Sure, it uses an external battery, but since many of our rides are up to ten hours long, I'm good with a bit of battery weight in exchange for the piece of mind that the rear light will be very visible whether we roll into town at noon or midnight.

Anyone using Li-ion batteries really should look at the battery care page on Dinotte's web site.

http://dinottelighting.com/battery-care/