Okay, I totally understand that the batteries have a life span (can't believe how fortunate I've been with mine! Sign of another great product!). However I didn't think that would apply to the wall chargers but ... maybe I'm wrong? Just seems like they aren't charging up my batts like they used to. If it weren't that I have two relatively new auto shorties, I would think that it was my older batteries finally wearing out but I just don't know. I do understand that the shorties have a ... well, shorter battery holding power but it just doesn't seem like they are holding up like they should either. Anyway, just wondering ... does anyone know if the wall chargers will eventually lose their ability to charge properly? Guess it's probably time I really did some upgrading on my hardware finally! Of course I couldn't do that without ordering a few more cartos, right? Especially that watermelon!! OMG! Those are GOOD!!!