Bike tail light

I used a pair of this for about two years. They are extremely cheap, bright, and battery is long lasting... but it is also bulky and casing will fail you at some point.

I upgraded to this rechargeable COB light back in 2018?

Which is still working despite under rain a few times.

I am current using this INFUN F50 COB with motion sensor.

My next upgrade could be Olight x Magicshine RN180.