Can you charge a laptop with a power bank?

Question

Charger

On hand there is a laptop, lenovo with current consumption 20v 3.3A
There is a power bank ramoss for 30000 mach, with a maximum output current of 12v
Can I somehow charge a laptop through this power bank? Using an inverter with Ali with 12-v-220v
Buy a turnkey solution? (Could not find)

Answer 1

In theory, everything is possible, however:
- usually power banks have only USB outputs, and there is 5V. 12 there can only be through some kind of quickcharge, if one is supported by the bank itself and the inverter (oh, I doubt that there are such inverters, although xs, maybe the Chinese engineering idea has reached)
- you need to look at the maximum output power (let's say for quickcharge 12V and 3A => 36W), divide it by 1.5-2 to take into account the efficiency of the entire chain. Your laptop, as you write, has a max power consumption of 20*3.3 = 66W. Again I doubt that there are power banks capable of delivering 100W +
- well, charge a laptop with a 50-100 Wh battery from a bank with plus or minus the same capacity ... well, xs

Answer 2

On the hands there is a laptop, lenovo with current consumption 20v 3.3A

Where is this data taken from? Usually nothing like this is written on laptops, and even in the technical description it is not always possible to find it.

There is a power bank ramoss for 30000 mach

Mahi - what kind of unit, what physical size? I only know the Mach number, which is the speed-of-sound factor for airplanes.

with maximum output current 12v

If this is the maximum current, then maybe 12 amps? Then it is a very powerful PB. Or is it the output voltage? Then everything is correct, there are volts, but then there are no maxima, this voltage is quite stable.

Is it possible to somehow charge a laptop through this power bank?

Just charge??? I understand that you want to charge the built-in battery from an external one, and then, when using it, power the laptop from the built-in one. A very strange way. If I were you, instead of charging the built-in battery, I would immediately power the laptop from an external one, without bothering with charging (although, of course, the built-in battery will still be charged along the way). You can’t directly power a laptop from 12 volts, it just won’t work.

Using an inverter with Ali with 12-v-220v

Yes, it is possible, and users who do not understand anything about electricity do just that, but ... this is a very ugly way. Firstly, it is complex, it involves too long a chain of devices: a power-bank (in front of which is its own charger), then an inverter, then a regular power supply from a laptop, then a built-in battery, and only then the laptop itself receives power. Secondly, the efficiency of such a long energy transmission chain will be low, since each of its elements will consume energy for itself.
From the technical side, it would be ideal to get an external battery for 19 ... 20 volts, and power the laptop directly from it. If you had not PB, but say, a couple of car batteries, then by connecting one in series and half of the second (12 plus 6 volts), you would get 18, which is almost what you need. True, one would have to figure out how to charge such a system, but this is a solvable issue.
If you want to power the laptop from your PB, then a long chain using a 12-> 220 inverter is almost inevitable.

Answer 3

You need a power bank with support for power delivery and a PD trigger adapter. I charge Lenovo and DELL without any problems. No extra losses on additional conversion