Strange Ebike Cells any info

Hi
I wounder if anyone how any info about this type of cells?
I have got 10 ebike packs with them and plan to use them with a ups
what type of charge can I use and how to test them?
It safe to use with a 500W Ups?







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David

Apparently they are no good if the get a "belly".
I had some of those cells, rated 15 amps!, but they get a belly after harvest.
The advice that was given, was to be better save than sorry.
I separated them to the bin.
Rather lose some cells than my house, sorry to say.

Best