These cells were purchased and given for testing by rover, thanks!
Coming „from ebay“, they are packaged with a charger, which fills them up for around two hours.
Here's how they stand up against some AA-sized cells:
Despite the size, they are quite light - around 33 grams each - which, it seems, is an almost reliable indicator about the quality and quantity of the chemistry inside. We don't expect much from these; and indeed, the actual capacity is around 800 mAh - more than five times lower than the one stated on the label!
Capacity test immediately after unpackaging (i.e., the factory charge):