I have a 13 mini I recently had Apple replace the battery in it and another where I installed that high capacity diagnostic compatible battery in. I’m comparing both over long term to see how well the aftermarket SUNWODA battery will perform over time by collecting actual data between both devices. Only time will tell but for now the 13 mini with the aftermarket battery has been performing very well.
I’m posting this based on what I am seeing over time. I do agree some are simply over rated crap made in China being sold. There’s no way you can have a 15,000 mAh battery, or 22,800 mAh battery in this example below, inside a 13 mini.
Here is an example of one of those fake batteries being sold for the 13 mini I found for sale on Amazon.