[1] https://p.kagi.com/proxy/jaJn771.jpg?c=LeUEJczBkA3eiHIb6Q3EK... It doesn't quite come across in the picture but this adapter is gigantic.
I'd guess the Colecovion has a linear power supply which is known to be very large for the power delivered, and very inefficient. A quick search says the power supply was 28.5 watts. I'm typing this on a laptop with a 15 watt power supply (pinebook pro - about as low power as you can get in a laptop); connected to a USB hub with a 20 watt power supply!. My work laptop has a 240 watt power supply. I'm not sure what laptop you have, but I'd guess it can draw more power than a Colecovision if you worked it - but also that if all you were doing was running 10 Colecovion emulators it would draw less power.
We also should mention that our laptops have a screen built in and counted as part of the power consumption. The Colecovion expected to be connected to a power hungry CRT television.
Laptop is a Thinkpad P16s AMD Gen 2 (name rolls right off the tongue). I don't actually know what the power draw is, but it's plugged into a 100W power supply right now via USB-C.
I tried it and it redirected to the imgur.com front page. And I am logged into a paid kagi account. I guess the URLs are per-user.
Regardless, it's not hard to find; if you go on YouTube people show off the colecovision adapter. I think even the Angry Video Game Nerd mentioned it in his video on the Colecovision.