We have two Lectric 2.0's Long Range for camping and the neighborhood. They have worked out great for us.
I also have a Specialized SL Creo Comp Carbon which is a blast to ride.
CA here too. On my Creo 1 (Mastermind TCU), I have is a blinking tail light and a flashing front for daylight. I did add a Cycliq Fly 6 pro camera and a Bryton Gardia 300L radar.
I have a 2022 Creo 1 Comp and two range extenders. I finally took the extender cage off and installed a side load cage.
The band goes around extender and cage. Holds it just fine. Extender is simple to put in and out with the side loader. The top is not fully plugged in, just finished charging.