Joerg wrote:
On 2018-02-11 09:28, sms wrote:
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.


Does it at least have a low-battery warning?


Sure. There are six red LEDs at the back of the unit. When they get really
dim, your battery is low.

PS: What is the use of a low battery indicator on a device that is mounted
where you can't see it?