4-Count TENAVOLTS Rechargeable AA Lithium Batteries w/ Charger Expired

I think you are missing one important letter:
they 'sell' you mWh and you are talking mAh, like most batteries mfg provide info.
So, let's translate: 2775mWh / 1.5V = 1850mAh. Knowing how those guys like to overstate, I'd say you get about 1600mAh... at best.
These are Lithium batteries and I quote: "Lithium batteries can provide extremely high currents and can discharge very rapidly when short-circuited. Although this is useful in applications where high currents are required, a too-rapid discharge of a lithium battery can result in overheating of the battery, rupture, and even an explosion." end quote hence why they should not be used in flash cameras!

$34.99 🤔 now $11.99 Either it is a good deal or another junk. I only go with eneloop or panasonic.

@TravisO2 is being alarmist and ignorant of this product. I bought some last round to check out. They use somewhat deceptive advertising. Instead of using mili-AMP-hours, like NiMh, they specify milli-WATT-hours.
I tested them on a good analysing charger; they are around 1600-1700mAh.
If capacity is the thing you are after, you can certainly do better with quality NiMh. Not all NiMh are 2400mAh. The BEST NiMh are probably Eneloops 'standard/white' with 1900-2000mAh. NiMh OVER 2600mAh are almost all short lived junk and give a bad name to the product. Even the 2400-2500mAh Eneloop Pro do NOT have as long a life as the standard Eneloops. This is readily available information from Eneloop.

Note on inaccuracies in @TravisO2 post:
- Not ALL batteries combined are 2775mAh - that is simply untrue. They are NOT 700mAh.
- You CAN get VERY small lithium cells if you want to. A 14500 is the same size as AA and is used quite commonly.
- They are highly unlikely to explode if used in a camera. The PROBLEM with SOME devices is the constant 1.5v they DO PUT OUT, may be TOO HIGH for some devices and fry them. You use them at your own risk.

Since they DO put out 1.5v constantly they 'may' work better in a few devices....maybe. OTOH, there is no decrease in voltage, no warning the are almost out of juice. One moment they seem to be fine.....the next they are 'dead'. They simply cut off and quit.
They ARE protected from over discharge so this is not harmful. This also protects them from damage and the increased likelihood of fire with use.

The charger, and the batteries, are a unique design and you MUST use the proprietary charger. Do NOT attempt to charge them in a NiMh charger. Do NOT give these to people that do not know EXACTLY what they are and how to take care of them. The charger seems to work fine and they charge properly and fairly quickly.

IF you don't know exactly what you want these for....you probably don't need them. They are a product looking for a niche. At $12 it's a decent new product to play with. At the stock price it's stupidly expensive and not worth it at all.