Electronic – Why are these batteries I bought from Costco called “Battery Piles”

Bottom one is single use (not rechargeable!) battery for heart defibrillator.

These are sold for 2$ price because it's easier to sell them than recycle.

Recycling cost money, so they sell them on ebay or elsewhere to avoid responsibility. Someone buys them and at some point throw them away or... pay money for recycling to company that maybe will sell same battery again.

Don't buy batteries from recycling companies. Don't let this proceder continue and grow.

Lithium is hazardous substance and these bastards should recycle batteries, not sell them to random people after someone (or government) paid for recycling them.

Let's see- unknown brand name, claims of storage capacity beyond that of any remotely trustworthy manufacturer, found in a drawer so likely not engineering samples liberated from a top-secret skunkworks, and inability to spell the word "battery" on the label (BRTTERY?).

The whole thing screams arbitrarily labeled Asian-made product of the most dubious of origins. If you're lucky they'll function and have 2000mAh capacity for a few hundred charges.

If your computer thinks there is an alkaline AA cell in there it will report about half capacity since the NiMH cells have a lower voltage (1.2V vs 1.55V) when fully charged and a flatter discharge curve.

You could test the battery roughly by fully charging it and discharging it with a resistor but you'd have to monitor it to ensure the cell voltage did not drop below about 1V or the battery could be damaged. Make a measurement every 30 min or whatever and plot the result.