A bike light plug
 

I'm quite pleased with a Cygolite bike light.

Because of turmoil at work, I wasn't able to bike commute last winter. So the 10-15 year old Cygolite I've been using as a helmet light has been sitting on the shelf for a year and a half -- charged up before it was put away, but it's still a Li-ion battery. Got it out so I can see through tunnels on the Greenbrier trail this weekend, turned it on, and the Cygolite lit up brightly. Nice! But just in case, I decided to run the battery down before recharging it. It ran brightly for an hour before I got bored, turned it off and plugged it in.

Worst part of the experience was finding a cord with a mini-USB connector to plug in; technology has gone through two more connector designs since I bought the light.

I do not know what the latest devices from Garmin use, but many of their general recreation grade GPS units from a few years ago still used Mini (not Micro) USB plugs too. Garmin probably uses USB-C on any new products to conform to the EU rules.

most "upgrades" has been due to the charging means. If it at least supports inductive charging, I'd keep certain things around, but thats not the case in this area.

Yup, Cygolite products are very well built, and customer service is good, too.

A brand new Garmin Radar unit uses mini usb.

I've been using this brand. They contain a removable 18650 lithium ion cell so you can replace the battery for very cheap when it wears out. USB-C charging too. You also have the option of carrying multiple cells and swapping them out as they run low.

https://towildbikes.com/

They dont list clearly the taillight lumens.
why can't someone produce a 450+ rear light that has a minimum of 12 hours of battery life, usb c charging and compact? Don't need many "features" with it. Simple steady on, pulse flash & off. If it could sync Bluetooth to control its light activity then that's would be pretty cool.

A former co-worker has their front light, it is HEAVY! like the old lights with seperate batteries heavy. Also quite bulky but he said it worked well and the beam pattern seemed decent enough in my short test in my hand.