What is the maximum capacity of a power bank with a size of 20 * 10 cm?

Question

Iron

The bottom line is that I want to stock up with power banks from Asia, but when I saw in the names of small flat pb 100000 mA h, Chot thought that they either deliberately "accidentally" add an extra zero, but if it's almost everywhere, then 7000 will become 700, which is even for medium there are not enough power banks or something else is wrong with the measurement among the Chinese. It is clear that all this is for the sake of nailing with a translucent deception of the buyer, such as adding a wire for 100 re to goods where there is a choice of variation, and thus an object for 10,000 will acquire a price of 100 (as a general one but with a price from). But to the point, those who know the topic, if the brother of an ordinary power bank is slightly larger than a large top smartphone now, then what will be the real maximum capacity? 30000 mAh? Or just 10k? What is the approximate weight? Compare with goods the same weight from the US is logical, but often power banks are finished with different designs with different hardware inside the type of controllers, from which their weight changes regardless of the battery itself. As well as 18650 batteries, what is the maximum volume and weight of one battery (3400mah?)? And then there are already a lot of stories with what has come and what is actually after the measurements

Answer 1

The weight of one normal 18650 is 40-50 grams.