How To Change Dead Batteries on GameBoy Cartridges (With Soldering Iron)

Hello once again my fellow bloggers and game fans.. I had promised you that i d upload soon one more post on how to change gameboy cart batteries with soldering iron.. Well its not so soon i suppose but better late than never right?! So lets get to the point.

Since we have to do with heat, electircity, precision, steady hands and all that this time, this means that we have to be extra careful. The idea is more or less the same like last time. We need to replace batteries so our cart can hold a save once again like new. I experimented with my own cart. It was my first time using a soldering iron so a good friend helped me out with this (so if you are not familiar with the iron i recommend to have someone more experienced to help you) and finally the cart is brand new. I used my second pokemon gold. I m not responsible for any damage  u do to ur cart or whatever i just suggest a way that worked for me and several others on the net. So here is the guide:

1. What You Will Need

a) A GameBoy Cartridge with a dead battery ( i used orginal Pokemon Gold version) 

b) A pair of tweezers

c) Some solder

d) a new CR2025 battery or a CR2032 (3V) with metal pins (differences are that the second one is fatter n has longer lifespan. NOTE: if u use CR2032 u may find it difficult to close ur cart afterwards but still works)

e) A soldering iron

f) A GameBoy console (any GameBoy - GameBoy Color - GameBoy Pocket - GameBoy Advance - GameBoy Advance SP will do)

g) and a peg ( u may need it but i forgot to include it in the photo above. Sorry!!)

2. Dettach The Old Metal Battery Pins With The Soldering Iron

After unscrewing the cart, sliding down the rear part and opening it (i described those steps in the previous post so im not gonna include them here as well) plug in the soldering iron and wait to heat up. You should do this in a well ventilated room (if u use it for the first time cos theres gonna be a lot of hazardous smoke). After its point is heated up enough, steadily touch the silver sides next to the battery where the old battery was attached to. The old solder will start melting in seconds freeing the battery's each side. Do both of the sides and ur gonna have the dead battery apart from the rest of the circuit board. Now ur ready to solder the new battery.

3. Solder The New Battery


Place the new battery on the circle where the previous one was exactly the way it was (letters down). Bent the terminals (metal pins) so that they touch the spot that u were heating before with the soldering iron. Now is the past where u might need to use a peg. If ur not sure enough that u are gonna hold the battery steady use a peg like indicated in the pic for better stability. Take some solder and heat it to melt. Its gonna melt in secs and the melted solder will hung from the tip of ur solder. With careful small moves touch the melted solder to the part that the terminal of the new battery touches the old left dry solder. It will turn to solid in a few seconds forming some kind of strong glue that will hold the battery in place. Repeat the same process to the other terminal. NOTE: In any case do not heat the battery and do not touch the circuit board with the point of the soldering iron. If u followed all those steps correctly u ll have ur cart with a brand new battery ready to play.

4. Put The Parts Back Together And Test

The hard part is gone. Now take the circuit board and place it inside the rear part of the cart case. Put on top the front part n slide it upwards. Screw back the nintendo screw and test ur cart to a Gameboy/SP console system! And thats it! Ur cart is brand new and now can hold a save like before! Enjoy!!! :D