Buy LG, Samsung, Panasonic, roofer, eve 18650 batteries online and see what the

[ASICS]

I'll put the test data downstairs. The picture is taken from the video and is a bit blurry

Batteries were purchased from 5 suppliers, 1 passed, 1 was up to standard and 3 were fake.

Subsequent to finding a way to make this battery, I purchased some of the materials back.

[ASICS]

Test results
Battery fully charged 4.2V
Discharged 2.8V, 1A

[NiHaoMike]

Looks like the LG and Panasonic are counterfeit or old stock, genuine new ones wouldn't perform that poorly.

[RoGeorge]

Not counterfeits.  Most probably the measurement didn't follow the specifications from the each battery's datasheet.

Each manufacturer specifies the exact conditions for how to charge and how to discharge their battery in order to get the Ah, by each model of battery.  If not done as in the datasheet specifications, there will be different results.

Otherwise, it will be like measuring the volume of air from a car tire, and saying the envelope is fake.  It depends of the pressure it was inflated, and the temperature. 

Similar, the Ah written on a battery is not an exact value.  The Ah is a number specific to the charge-discharge process, the currents used, and to the internal temperature of the battery.

[wraper]

Not counterfeits.  Most probably the measurement didn't follow the specifications from the each battery's datasheet.

Not counterfeits... just recycled and re-wrapped e-waste.

[tunk]

A couple of these has been tested by EEVblog member HKJ:
https://lygte-info.dk/
https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-20R%202000mAh%20(Green)%20UK.html
https://lygte-info.dk/review/batteries2012/Panasonic%20NCR18650B%203400mAh%20(Green)%20UK.html

[mendip_discovery]

Use until discharged, re-charge, and test.

Do the above 10 times even before claiming a battery tester is right.

[ASICS]

A couple of these has been tested by EEVblog member HKJ:
https://lygte-info.dk/
https://lygte-info.dk/review/batteries2012/Samsung%20INR18650-20R%202000mAh%20(Green)%20UK.html
https://lygte-info.dk/review/batteries2012/Panasonic%20NCR18650B%203400mAh%20(Green)%20UK.html

Thanks for the correct values for these batteries!

[ASICS]

Use until discharged, re-charge, and test.

Do the above 10 times even before claiming a battery tester is right.

The results are similar for as many times as they are carried out again. They are is recycled and re-wrapped e-waste.