I have only ever had two complaints and they were from the same person, but i dont think it is from the way he treated them, unless the damage was caused by soldering them up. I do know of others (Mr C and Mr P) who had dead cells on arival (but those were not of my matching, they were from a well known brand).
It could be that there are manufacturing or material issues with certain batches of cells. They certainly have a shorter life than other cells overall.
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