On 2/11/2018 8:19 AM, Joerg wrote:

snip

Or in my case real electrical systems such as cars had them for decades.
Though I was surprised how few cyclists do this and that still holds
true today. Most just have blinkers with some tiny AAA cells in there.
The designers of those things usually weren't even smart enough to
integrate a low-battery warning so I often see riders where the rear
light has fizzled to the power of a glowing cigarette tip.

Those AAA cell lights are really annoying.

My favorite tail light is the CatEye TL-LD1100 which uses two AA cells.
It also is one of the few tail lights that still has side-pointing LEDs
as well are rear pointing LEDs.

Still available from Asia.
https://www.aliexpress.com/store/product/CATEYE-Bike-Bicycle-6-LED-Rear-Tail-Laser-Light-Bike-Back-Red-Light-Safety-Warning-Flashing/434036_32786881487.html.