Gameboy Pokemon Cartridge Upgrades

[XR4CK]

Hello, I am new here in the formus and I have one important question. I have been researching a lot but the only closest topic I could find was this one here! I do repair these old original cartridges and I noticed on one Pokemon Crystal, that the C4 capacitor is missing.

• Can somebody explain me its function (because the game also works without it, and also saves the game!)?
• Does also someone know the exact value of this little component in order to replace it?

Greetings!

 

[Danielalfaro0673]

Cartridge is finished. It works! I still have some minor adjustments I want to make to this design before I’m done, but this is a big win today. I will be releasing my board design to the public so anyone can order this board for themselves! Thanks for watching!
View attachment 107304

Were can I buy this bord

 

[4d1xlaan]

you can get something like this these days

https://funnyplaying.com/products/midnighttrace-gb-gbc-flash-cart-v2