That puts most of the liability on the seller. If Customs ever goes after the seller, and it could be proven that you knew that the original country of origin was China, in their view, you would be a co-conspirator in the customs fraud.
Would...
I keep them out in the open, as they will get very warm if they’re discharging in an enclosed container or in foam padded cells inside a case of some sort. And don’t let them discharge packed touching against each other.