Help identifying these Sega MK-2103 power/AC adapter variations?

[dhowerter]

OK, so a couple basic questions just to be safe:

1. Do all of these lovely MK-2103 revisions output EXACTLY the same Voltage / amps/ etc.?

2. So are we SURE that any MK-2103 is safe to use on any USA Genesis 2? (even the Game Gear one? )

3. Do ANY (all of them, not just the ones shown here) MK-2103s say "for use with Genesis 2" or something like that?

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[A Black Falcon]

OK, so a couple basic questions just to be safe:

1. Do all of these lovely MK-2103 revisions output EXACTLY the same Voltage / amps/ etc.?

2. So are we SURE that any MK-2103 is safe to use on any USA Genesis 2? (even the Game Gear one? )

3. Do ANY (all of them, not just the ones shown here) MK-2103s say "for use with Genesis 2" or something like that?

.

The Game Gear uses a standard MK-2103, so yes, of course the GG power supply will run a Genesis 2. You can run a GG on any MK-2103 type. I use the normal one (on the right) for mine. And yes, from the picture it's clear that all three have exactly the same output. Why they redesigned it just for the GG version I have no idea... and the box just says "Game Gear" on it and stuff. Trying to hide the fact that you can just use any standard Genesis 2/32X power supply or something?

[Sailorneorune]

Possibly. You can also use any MK-2103 adapter for the Nomad - at least, based on my own experiences.

[ludemix2000]

Does anyone know what kind of safety screw bit is needed for the bits in the PSU on the far left in the first picture? I'm trying to open it but the standard 4mm socket doesn't work.

NVM. It's a gamebit.