How to extend battery life on retro handheld game consoles

Classic handheld game consoles from the late 1980s through the early 2000s are notorious for chewing through batteries fast. The original Game Boy, for instance, requires four AA batteries, while the Sega Game Gear needs six.

One of the simplest fixes is switching to rechargeable nickel-metal hydride (NiMH) batteries. They're reliable, reusable, and much cheaper over the long run than disposable alkalines. Panasonic Eneloop batteries are a popular choice known for holding up well over time, while IKEA's LADDA batteries offer a cheaper alternative — some speculate they're rebranded Eneloops, though this hasn't been confirmed.

Different handhelds require different battery counts: the Game Boy uses four AA batteries, the Game Boy Color and Game Boy Advance each use two AA batteries, the Game Boy Pocket uses two AAA batteries, and both the Game Gear and Atari Lynx require six AA batteries each.

It's worth noting that battery indicators on these systems don't always behave consistently with rechargeables, so it's a good idea to save your progress promptly once a low-battery warning appears. A common recommendation is to keep two full sets of batteries on hand — one in use and one charged and ready. Modified consoles with brighter screens that draw more power may benefit from a third set, or from pricier 1.5V rechargeable lithium batteries.

USB-C modifications

Some handhelds, including the original Game Boy, can be modified with USB-C rechargeable battery pack kits, making them more convenient and modern to use. However, these mods come with downsides — some fail to fully isolate the battery during charging, which can generate extra heat and make playing while charging less safe. It's therefore recommended to check user feedback before choosing a particular mod.