Lots of phone charger batteries (18650 lithium) (Trowbridge BA14)

We have 650 (yes really!) of these portable phone chargers to get rid of. We bought them a few years ago as trade show giveaways but the trade show was cancelled and they have our old details and branding so no use.
I have 6 boxes of 100 each and another half box. I don’t want to split the boxes up - just take a box of 100 or nothing! Preferably several boxes.
Might suit someone making their own storage batteries or something, the accompanying doc says that they are 18650 lithium batteries inside, but this is all obviously at your own risk.