As an alternative to using four AA batteries, the original Game Boy includes a DC power supply jack that allows players to use an AC adapter to power their console. Now you can expand the capabilities of your Game Boy even further, and power your console through a USB power source with this USB to power adapter.
NOTE: Be sure to remove batteries from your console prior to use; not doing so can cause a fuse to blow on your console.
It works as advertised - just make sure not to use it when there's batteries in the console. It's a great tool to have when you want to test something without having to put the whole console back together.
Works exactly like it should!!! No problems.
Excellent device! Connected to a power bank is cheaper than the inner battery.
Game Boy USB Power Cable
Helps to figure out if it is just a battery terminal issue while repairing Gameboys. Also nice to play without worrying about a battery.