Sega Genesis Model 2 AC Adapter (MK-2103)

10 V DC barrel wall adapter with a smaller plug than Model 1

Verified November 2026

Cheaper aftermarket part

Genesis 2 / 3 AC adapter

10V DC, 0.85A min, 4.75×1.7 mm, center positive

Replacements are sold for Models 2 and 3, and a Model 1 supply can damage this console.

Check first: Check it's sold for Genesis 2 and 3. Don't use a Model 1 supply: the polarity is reversed.

Exact part

MK-2103

The usual mistake

Grabbing a Model 1 adapter; polarity is reversed.