Over at Hackaday.io [AndyHull] popped open some cheap LiPo battery power packs to see if ... [Andy] looked at have a TP4221 controlling the charge cycle for up to four 18650 LiPo cells connected ...
While debugging a strange battery failure in a manufacturing process, [Josh] discovered a new (to us) LiPo battery failure ... each in a different initial charge, into a plastic bag and tortured ...
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