- Delivery properly. Here one has to say anything further. Battery ran a few weeks without any problems, then he failed rapidly. I just first annoyed by the "bad" battery, especially since other reviews report similar. Had then the toothbrush reopened, only to find that the soldered contacts of mine were slightly corroded or thereby had lost contact. Pressed torch, make sure that the solder paste, the metal lip surrounds - and you're done. Works again! Aussgeben hire 12 euros more and at stores that offer this exchange, sending. (It's been a fumbling for inexperienced ... like me). Generally, however, recommended!