Hardware Wii power trouble (again)

[Biovirulent]

I made a previous thread about how I blew the fuse on the wii, so I removed it and bridged it.
Now that I have done that, it successfully turns on when plugged into a wall.
However, unlike before I blew the fuse, my 12v battery pack no longer powers it. The battery bank immediately turns off when trying to power the wii. The battery bank still works, as it still powers my gamecube just fine. It's definitely not low on battery life.
Is the fuse necessary to power it with a battery? What's going on here?

EDIT: I got it to power with the battery.
For some reason, it needed to be powered in the wall first and now it works from the battery. (???) Strange, but it works nonetheless.
Any ideas why this happened though?

 

[DeoNaught]

Does the wii, and the Gamecube have different voltages?
if you have ANYTHING plugged into the Wii, (Usb, Gamecube controller) take it out.
did you try plugging the wii into an outlet?
if you rigged up your own plug for the wii, make sure none of the wires are touching each other.

 

[Biovirulent]

Does the wii, and the Gamecube have different voltages?
if you have ANYTHING plugged into the Wii, (Usb, Gamecube controller) take it out.
did you try plugging the wii into an outlet?
if you rigged up your own plug for the wii, make sure none of the wires are touching each other.

Wii uses 12V and gamecube uses 12v or 14.8v as far as I know.
I did plug it into an outlet, and then into the battery and it somehow worked.
I made sure wires weren't touching.

 

[DeoNaught]

Wii uses 12V and gamecube uses 12v or 14.8v as far as I know.
I did plug it into an outlet, and then into the battery and it somehow worked.
I made sure wires weren't touching.

Do you have another wii you could try? see if it is just yours, or every Wii.

 

[Biovirulent]

Do you have another wii you could try? see if it is just yours, or every Wii.

If I had another wii, I wouldn't bother with the one I am using haha
I'm guessing the capacitors just needed to store a bit of power before being able to turn on using the battery pack.

 

[DeoNaught]

If I had another wii, I wouldn't bother with the one I am using haha
I'm guessing the capacitors just needed to store a bit of power before being able to turn on using the battery pack.

Try leaving the battery in the Wii come back 10-15min later and turn on the Wii

 

[foob]

OP, are you by any chance off-grid or on a solar / car / RV system of some type?

I'm interested in powering the Wii off 12V without using an inverter. 12V cigarette lighter plugs (or similar) with a Wii plug on the opposite end seem very hard to find. I guess the only way is to buy a cheap Wii AC power supply and cut the cable off it in order to connect a battery / regulator to the Wii in order to power it without using an inverter and the normal AC power supply?