I'm selling my Oral B IO Series 9 toothbrush. it was working fine until a week ago then the battery level started going down quickly and now won't switch on. I bought a new battery as a lot of online forums say this is a big issue with these. I took the bottom off expecting it to be like a torch battery that would drop in but its not that simple and way beyond remote battery changing expertise. it comes boxed with the charger and carry case.
