So equipped Atari requires probably more amps than your powerbank can deliver. Or probably not the powerbank itself but the cable, that is very thin and limits the current.
->link<- ^^^ Here you can find some info how to make an Atari USB power cable. Additionally, there is also some information about the power consumption of specific configurations: Quote Atari 65XE fabryczne 560 mA Atari 130XE fabryczne 620 mA Atari 800XL fabryczne 810 mA Atari 800XL + Stereo + Ultimate 830 mA Atari 800XL + Stereo + Ultimate + Side2 + mysz 1000 mA Unquote
From (my) experience, in most cases a 5V/2.2A power supply is more than enough to power an Atari with an additional memory module + Cartrigde or FujiNet or other SIO2SD.
In my opinion, the cable (may be) is to long. The voltage drops with every additional meter of wires... and in the video i can see a "nice cable extension" :) Check the voltage on Atari board (power connection). Should be 5V.
Just to check - I took my full-featured 800XL machine (with U1MB, VBXE, Rapidus and stereo, Side2) and connected it with a USB cable to a stand alone USB HUB (with separate power supply). The machine booted but I noticed that when everything was on (including Rapidus), the power meter reported 1.25A@5V but there were problems with reading a CF card - something similar to your case. But the PSU was not able to deliver more juice, it seemed to have a ~6W power limit. So I took a stand-alone charger with up to 2.4A output. With it connected, the power meter reported up to 1.37A usage at peek (so it's not supprising that 1.25A was not enough) and everything worked just fine.
The power cable I used was built of an old USB cord for a Kindle by Amazon - a really solid piece of wire. I think it's able to deliver a lot of current. And I think, your cable isn't, this is why you're experiencing problems...
@w1k - try best cables and best powerbanks. If you try lo-q stuff, you'll get lo-q output. Powerbanks are simple bulk step-up converters, often output has a noise which does not help. Popular cables have thin wires, it does not help neither. Today flash cards are fragile to power fluctuations. They get peak current much higher than idle, so power supply must be strong. When working with Fujinet, the horizontal darker bars are visible during transmition wven I have good power supply and no extensions inside Atari.
The wire should have 0.75 mm2 or like and should be made from copper, not copper-coated iron. Check if all works ok with power-enough power supply.
We do not know your setup (to the ground) and what can be wrong, so we cannot help you more than "just thinking".
That's why I do not sell usb cables with Atari plug on the end. There are reports they work, but more pain than gain. The USB+powerbank solution should be used only when you play Bare Atari with cartridges, or use a IO device which barely draws power.
sure, im only testing it.. i have u1mb, side 3, ultra video 1.0xe, ramdisk led checker and o2 fixer. i also think that such a solution is only good for the basics - cassettes and so on.
