IKEA LIVBOJ Qi charger melted and burned!

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I have been using my 3D printed wireless phone charger stand for couple of month now. It has two IKEA LIVBOJ 5W Qi chargers, and of them decided to make some smoke. It took me some time to figure out where does the burning plastic smell comes from. Teardown Of course I couldn’t wait to disassemble the charger to see what has happened in there! The component in crime is a polypropylene (PP) film capacitor with part number 404J100V, also found on Alibaba. To my experience and knowledge it is quite unusual for PP film capacitors to explode. What most likely happened is that the capacitor got internal short, which caused a short circuit between positive side of coil and ground. As you can see, the MOSFET next to it doesn’t look good either. I know that this is the cheapest Qi charger one can possibly find, but such a fault that can potentially cause a fire was not expected. Surprisingly, I couldn’t find anyone else having this issue on Google in English. However, if one searches in Swedish, there are several people claiming that their charger has melted, look here, and here. Components I could identify only two additional …

Anker PowerCore+ 26800 teardown

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I have had the Anker PowerCore+ 26800 power bank for almost 3 years, and have been happy with it. The only feature I have been missing was a lack of pass-through charging. Pass-through charging is useful when one wants to charge their device of choice (or many) and the power bank at same time. You would only need to carry one wall charger, and would need only one socket. The overall charging power will be, of course, more limited compared to several power adapters. But, for leaving everything to charge over the night it doesn’t matter much. Another case, where pass-through charging is useful, is while using a solar panel as the only power source. The power bank will act as a buffer, and all connected devices will be charging continuously, no matter if a cloud covers the sun. The time has come I was unfortunate and left my backpack on the beach too close to the ocean, while swimming. A high wave has decently washed over it, and a little bit of water came inside. My phone and power bank was the only electronics in the backpack. While my water-proof phone was just fine, the power bank wasn’t. Some …