Engadget advises NiMH rechargeable batteries for retro handheld gaming systems

The advice covers Nintendo's original Game Boy, Game Boy Color, Game Boy Pocket and Game Boy Advance, as well as Sega's Game Gear and Atari Lynx. Battery requirements vary: the original Game Boy takes four AA batteries, Game Boy Color takes two AA, Game Boy Pocket takes two AAA, Game Boy Advance takes two AA, and both Game Gear and Atari Lynx take six AA batteries.

Engadget recommends Panasonic Eneloop batteries as a consistent staff favorite, with IKEA's LADDA line as a lower-cost alternative. Some have speculated LADDA cells are rebranded Eneloops, but that has not been confirmed.

It also advises buyers to get two full sets of rechargeable batteries so one set is always charged and ready. The low-battery indicators on these systems may behave differently with rechargeable cells, so Engadget suggests saving games quickly when warnings appear.

For modified handhelds with brighter screens or other power-hungry parts, a third set could be necessary. Some voltage-sensitive mods may work better with 1.5V rechargeable lithium batteries, although those tend to cost more.

The article also addresses USB-C battery pack mods for models like the original Game Boy. These kits can make a handheld feel more modern and remove the need for battery swaps, but some do not fully isolate the battery while charging, which can generate extra heat and make play-and-charge less safe. Engadget advises checking user feedback and choosing well-regarded mods.