Akom's Tech Ruminations

Various tech outbursts - code and solutions to practical problems

Low Tech Hacks Replacing batteries in a Philips Norelco T980 Turbo Vacuum Trimmer

Posted by Admin • Wednesday, July 27. 2016 • Category: Low Tech Hacks
I bought this trimmer in 2008 and the NiCd batteries finally died in 2016 - not bad. Still, no reason to trash a working trimmer and contribute to the landfill problem. As it turns out, it's fairly easy to disassemble, and even easier to reassemble. So here are the steps, which probably apply to many similar models.

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Low Tech Hacks Replacing batteries in a Sonicare Elite toothbrush

Posted by Admin • Wednesday, July 27. 2016 • Category: Low Tech Hacks
I've had this toothbrush for over a decade, and the batteries finally died. I suppose that's a long time for NiCd cells to last. For the last year or so the toothbrush would not complete the 2 minute cycle but would instead stop sometime earlier. The batteries are clearly still alive but simply don't have enough capacity.

The toothbrush is not designed to be opened (it is waterproof after all). That should not stop us. The safest way of opening the casing that I could think of was cutting it with a PVC rope saw. This makes a relatively quick cut and mostly does not affect anything besides soft plastic. The circuit board was spared. The location of the cuts is important. I had no idea where the batteries would be so I took a guess and cut it in half. Pulling the two parts apart caused fine wires to get ripped out of the charge coil, something that I could have avoided had I just cut around the batteries. The ideal cut would be just tracing around the batteries on the back side, creating a "battery door" shape. The batteries are soldered directly to the circuit board, so they need to be carefully cut away so that extension wires can be soldered on to allow for some wiggle room.
Opening the casing the wrong way

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