I bought the BLAZER wireless lights about a year or so ago. So far very happy with them. Very bright, simple to use and they can be swapped to another vehicle, loan them to a friend etc. I have had no issues in pouring rain and the batts last at least all day, I haven't left them in long enough to run them down yet. They use 4 AA per light.
I bought a charger and 8 extra rechargeable AA batts from Amazon, the charger came with 8. I charge all before I leave and swap them from the charger as needed, every driving day. The charger also has adapters for using AA as a C or D and came with 2 AAA.
I made a bracket for the back of my Jeep and have had no issues with theft or loss.
I'm happy with the set up.
Alpine Coach........That's how Jaguar would've done it!