What's worn out is the battery, which several months ago was getting down from a 60-minutes-left full charge to about 30 minutes on the display, before dying. Now it's getting to 52 or 50, which is a few days' worth of shaving, but it's getting to the point where I can't rely on it holding its charge for, say, a long weekend trip. Technically, you can get replacement batteries from some third-party sellers, but they require getting the razor apart, desoldering the old battery, and soldering in the new one. Could I? Sure. Am I likely to bother? No. This thing has lived its useful life span.
Unfortunately, when I was poking around Amazon at home before, it said I had eight hours to order with one-day delivery and get it tomorrow. Now, when I'm trying to order? It offers me delivery Thursday for the free two-day delivery, or delivery Thursday for the $4 one-day delivery. Thanks, but that doesn't work for me.
There are enough comments on the refurbished unit that looks just like mine suggesting that the battery isn't reliably a new battery that I figure I want to buy a brand new unit, but I guess I'm not ordering it from Amazon today. Might have to see if one of the local stores has one. I probably got mine at Target.