If you're looking to save your AA batteries from the draining abilities of the Sega Game Gear, look no further than this USB cable, available for both NA and EU consoles!
If you have a game gear this is a great thing to have, because Game gears love batteries and eating them. this helps lots. can even do like the old battery backup but with a modern power bank.
Lab Fifteen Sega Game Gear 9V USB Cable
Compared to the 6 batteries needed to power the GG, this cord is a life saver. Works great paired with a power bank, there's no comparison to lugging around expensive batteries.