Build a replacement for a broken proprietary AC adapter
Yesterday, my tablet (Medion Lifetab P9514) didn’t start anymore, even though it was plugged into the battery charger. The tablet is about four years old and my first suspicion was either the charger or the battery itself. Unfortunately, the manufacturer used a proprietary connector instead of a USB or coaxial power connector. This ruled out testing with one of the many AC adapters I already have.
Looking through offerings at various internet shops and markets and also at the original supplier showed quickly, that proprietary comes at a price. The lowest price was still a whopping 30 EUR for a seemingly simple 12V/1.5A AC adapter, which otherwise would cost at around 10 EUR or even less. Because I didn’t really knew, if the AC adapter was the problem, I was reluctant to spend so much money on this.
I rather rummaged in my toolbox, picking a wire cutter and a soldering iron. I also had a spare coaxial socket, which I planned to use as an adapter for my AC adapter. I cut the wire on the old, presumably broken, AC adapter and soldered it to the coaxial socket. I connected the inner wire (+) to the socket’s inner pin and the outer wire sheath (-) to the socket’s outer connector.
I then connected my tablet to the newly crafted adpater cable and the adapter cable to the AC adapter. After charging the tablet for a while, it resumed operation.