No battery worries now
These AC adapter kits complement the set-and-forget nature of the RTR-507s we use them with. We don't have to schedule battery changes as we do with other loggers. The RTR-507s really don't need frequent battery changes, but it's one less thing to worry about with the RTR-500A2s. These even have a rechargeable backup battery that will supply the logger if the AC power goes out or if you need to relocate the plug. They are easy to add to the loggers with a small Phillips screwdriver.