I purchased two replacement batteries type NB-6L for a Canon camera.
Above, the batteries are labelled 1050mAh. They appear to be well made externally, and fit charger and camera fine.
Note that these have different labeling to that shown in the eBay listing. It is naive to expect that the supplied item matches either pics or description, bait and switch is a standard Chinese technique.
The listing had a most exhaustive description of the quality of these batteries.
Measured capacity after three charge discharge cycles for the two batteries is 65% of rated capacity. Since this is the point at which I discard batteries, these batteries are for the rubbish tin.
If you don’t test after market batteries, you have no idea of whether you got what you paid for.
(The seller refunded the purchase price as a result of an eBay dispute process.)