Gardia R300
Bryton Gardia R300
rear lightusb type-c
12-17h 
L7
Cycplus L7
rear lightusb type-c
25-36h 
Varia RCT715
Garmin Varia RCT715
camerarear lightusb type-c
4-6h 
Varia RTL500
Garmin Varia RTL500
rear light
Varia RTL515
Garmin Varia RTL515
rear light
6-16h 
Varia RVR315
Garmin Varia RVR315
7h 
SR30
IGSport  SR30
rear lightusb type-c
20h 
~ $140
L508
Magene L508
rear lightusb type-c
10-19h 
CarBack Bike Radar
Trek CarBack Bike Radar
rear lightusb type-c
7+h