Modern rechargeable batteries can make retro handheld consoles cheaper and easier to use, while reducing disposable-battery waste. The guide recommends choosing battery types and quantities suited to each console, and exercising care with aftermarket USB-C modifications.

– NiMH rechargeable batteries, such as Panasonic Eneloop or cheaper IKEA LADDA cells, are recommended for most users.
– Battery needs range from two AA or AAA cells for several Game Boys to six AAs for the Game Gear and Atari Lynx.
– Buy two full battery sets so one can charge while the other is in use; modded consoles may need a third.
– USB-C battery packs can remove battery swapping, but users should check safety feedback because some may heat up during charging.