EOS 7i Charger

[BrianG]

With the properly sized supply, yes. However, even with a billion watt supply, you can only charge a 5s pack at 5.7A because of the 120W limitation of the charger. If you use a 100W supply, the charger will also be limited to 100W and will only be able to charge a 5s pack at 4.7A.

MM's link is for a specialized computer supply, probably for a proprietary server of some kind. The one in my post is a power supply you can get at any computer shop. BTW: mine has a cover - i just removed it to show the internal wiring.