Things You'll Need
Instructions
Charge your Game Boy micro's battery to its full capacity. This can be done by inserting the AC adapter's connector plug into the connector on the top of the unit. Then insert the adapter into the wall outlet. The Nintendo logo on the connector plug should be facing up for proper insertion.
Remove the adapter from the wall outlet. This makes the Game Boy micro operate from the charge of its battery.
Notice the amount of time before the Power light turns off. This can help you determine the cause of the problem.
Make note of whether your Game Boy micro holds a charge for less time than it used to.
See if the unit functions for a period of time before shutting off. If it does, the problem is likely with the battery. If the unit shuts off immediately after unplugging the adapter from the electrical source, then there is a more serious problem.
Visit the Nintendo Web site to browse their online store of equipment for their devices. This is the best place to get officially licensed equipment, such as replacement batteries, for your Game Boy micro.