Rechargeable Batteries Don't Last Long

I went from a standard battery powered Oral B to a rechargeable model last year, but discovered the rechargeable battery only lasted about 15 months. It then died and would no longer take a charge. When I investigated replacing the rechargeable battery, I learned that the device is not designed for it to be replaceable. In other words you have to take the whole thing apart, modify a store-bought rechargeable battery to fit and then solder it back in before reassembling. Poor design unless you want to design obsolescance. A complaint to the company didn't go anywhere, not even an acknowledgment that the design should be changed to make the battery replaceable!

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