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I've done a lot of charger teardowns, and very cheap chargers always violate UL safety rules. It's a combination of cost (e.g. triple-insulated transformers), i
by kens 8y ago
I've done a lot of charger teardowns, and very cheap chargers always violate UL safety rules. It's a combination of cost (e.g. triple-insulated transformers), it's hard to fit clearance distances into a small charger, sloppy manufacturing, and they don't seem to even try.
- microtherion 8y agoI respect your superior expertise, of course, but looking through another site that has done systematic teardowns and measurements (https://lygte-info.dk/info/ChargerIndex%20UK.html https://lygte-info.dk/info/ChargerIndex%20UK.html), it appears to me that this might be too categorical a statement. While counterfeit chargers almost always seem to be dangerous, there seem to be some Chinese brands which produce quite respectable chargers, while still being fairly inexpensive.
- jdietrich 8y agoThe point is that you don't know. A legitimate branded charger will have been tested in a certified test lab, while an off-brand or counterfeit charge is likely to have a counterfeit UL mark. It might be perfectly safe or it might be a complete deathtrap, because nobody has actually tested it for compliance.
- joshu 8y agoI need a bunch of chargers for a sensor network (Right now using Wemos D1 Mini boards). Any advice on optimizing for price without compromising on safety? I don't trust the sellers that sell $2 chargers...
- jdietrich 8y agoAnker, Aukey and Blitzwolf make reasonably priced and high quality chargers.