I was only torn, which battery I should buy where. Especially the negative voices "does not fit, contact with short battery is not charging etc." had unsettled me. On the seller's website, there are, however, very good descriptions to change and what should have been adhered to. It shows that some people have probably ignored these instructions. So first the charger tested as described. Charging voltage in order. The old battery not unsoldered, but the new soldered to the old solder tails and feather trimmed as specified. Zahbürste reassembled. Time required approx 15 minutes. Be calibrated charging electronics and the toothbrush purrs like the first day.
For all the people who are insecure. Take a look at the customer's website. Do you feel after that insecure? Then use the exchange service is also offered.
