I checked for discontinuities in a weldless 18650 box. There was a 0.041ms loss of signal when I dropped it from 35-40 cm straight onto the lid against wood... Do you think it could be the PTC / CID which could have vibrated and lost power? Because the CID contact area is quite small compared to the battery terminal so perhaps it can arc from sudden knocks?
Can the PTC and CID in an 18650 have discontinuity from knocks?
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