GBA SP With DeWALT Battery Will Outlast the Apocalypse - Yanko Design
Briefly

GBA SP With DeWALT Battery Will Outlast the Apocalypse - Yanko Design
"The project comes from a Reddit build where a modder mounts a GBA SP onto a DeWALT XR FLEXVOLT lithium-ion pack, creating what commenters immediately dubbed the "jobsite Game Boy." The console's original tiny battery is gone, replaced by a buck converter that steps down the tool battery's eighteen volts to the four-ish volts the SP expects. The result looks like Nintendo and DeWALT secretly collaborated on a rugged portable for construction workers."
"The battery is rated at nine amp-hours at 18 volts, which works out to around 162 watt-hours compared to the few watt-hours of the original cell. Reddit did the math and estimated hundreds of hours of runtime, with one commenter joking that the battery might finally die fifteen minutes after the nukes start flying and another suggesting you could finish your entire childhood backlog before needing a recharge."
"The wiring is straightforward if you squint. The modder dropped a buck converter into the SP where the original battery lived, wired it to the battery contacts via a dummy cell, then connected that to a custom holder that slides onto the DeWALT pack's rail. Charging still happens through the regular DeWALT charger, so the Game Boy just thinks it has an absurdly large external battery that never quits."
A modder mounted a Game Boy Advance SP onto a DeWALT XR FLEXVOLT lithium-ion pack, replacing the original cell with a buck converter that steps 18 volts down to the roughly four volts the SP requires. The pack's nine amp-hour, 18-volt capacity yields about 162 watt-hours, producing estimated runtimes measured in hundreds of hours. The mod wires the converter to the SP's battery contacts via a dummy cell and a custom holder that slides onto the DeWALT rail. The console charges through the regular DeWALT charger. The shell was resprayed black with yellow buttons and a DeWALT logo for jobsite aesthetics.
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