Yes. I generally consider any fixed battery device to be future landfill waste. Considered a single CR123 model but that is a bit of a size increase for a keychain light. Hopefully by the time this thing dies they will pack more lumens into an equally small and affordable package and I won't feel as bad about the built in obsolescence as I do with cell phones and DAPs. Edit: Might try a 10440 in the Maratac just for fun. Probably 50/50 whether it works great or goes poof.