Genesis power supply work with an NES?

Okay old games enjoying crew! I just bought a used NES from a used bookstore in the same chain as the one I work in, but noticed it's got a sega genesis power supply with it, model 1602-1, rather than an NES power supply. The cable fits into the console, I haven't been able to test it out yet as I don't yet have an old tv these days to hook it up to, but the guys at the store said they did test it and it worked.

Should it in theory work? And if it does work, would there be any problems from voltage or whatever burning something out?

Thanks!

Typically if both the voltage and the amperage match the NES, then you shouldn't have any trouble.

So I compared my genesis power supply with my friend's nintendo one, mine reads

input: 120V AC 60HZ 20W, output: 10V DC 1.2A

And the nintendo one reads

17W, 60HZ, 120V, AC120 input AC9V

I don't really have an understanding of power, but I think this is "close but not quite?"

Yeah that's straight up not going to going to work out.

I did plug it into the wall with a game in it, due to not having a TV that works with an RF adaptor, I couldn't plug it in, but I did get power.

If your brick sends out 10VDC, and the Nintendo is looking for 9VDC you *should* be ok. Most electronics aren't super finicky about it, since the wall warts have to operate on pretty dirty AC power depending on where they're used. A 1V difference shouldn't be an issue-- I bet even the actual NES power supply varies by more than that. It's not ideal, but it's unlikely to damage anything. My friend actually did this exact thing for years. I always got a laugh when we plugged it in.

I'd check the output to be certain, but generally I'm fairly sure the answer is yes, especially considering you got it with the system. I use a Model 1 Mega Drive power supply for my Super Famicom and Famicom, and used to use it for my TurboGrafx, too. It's a super versatile power supply and I love it.

The original Genesis adapter is 9V, 1.2A. The original NES adapter is 9V, 1.3A. I really doubt the NES actually needs that extra .1A. If it did, it most likely just wouldn't turn on without it anyway.

I'm kind of amazed that those two systems use essentially the same amount of power.

@skullpanda1: They're both designed to function on mains power which for the North America is 120v.

Both companies probably looked at what they figured was the max draw they could get away with within home standards.