[Alan] procured a few Game Boys from a Yahoo auction with the intent of using them for some other projects, but one of the Game Boys was shipped with a very corroded battery which had eaten up one of the terminals. When [Alan] had repaired it, he was left with a Game Boy with no battery terminal at all, so he decided to splice in some lithium-ion batteries.
Not only does the Game Boy now have a new battery pack, but [Alan] was able to source a USB charger to handle the batteries’ charging needs. However, he realized that his battery pack was 3.7 volts, while the Game Boy only needed 3 volts. To lower the voltage of the battery pack to the required voltage, [Alan] grabbed a 1N4148 diode and put it in series with the battery pack, which also helps prevent any accidental reverse polarity.
This isn’t the most technically advanced Game Boy hack we’ve ever seen but it’s great to see new life breathed into these classic video game systems. Not to mention that [Alan] saved some lithium batteries from the landfill!