this post was submitted on 20 Mar 2026
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Technology
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This month I ordered a sample of 30 mass produced lithium ion protection circuit boards straight from the factory. Every single one in the batch has failed testing. They don't lock the battery out at low voltages (where it becomes a bomb when next charged), they don't protect against over current (where it causes a fire), and no surprises at all the over voltage protection didn't work either. Only short circuit protection "worked" because it blew up the protection board so bad it didn't pass electricity through in anymore