Hi all, apologies if this is in the wrong forum section, but AFAIK GBA came out after PS2, so... yeah.

At any rate, I was curious- does anyone here know how to replace a GBA cart battery? Do I need any special tools or whatnot?
I bought a Pokemon Leaf Green at a flea market and the battery keeps crapping out. I swear, if I have to deliver Oak's Parcel one more time...
On the contrary, if anyone on here could refer me to someone who could do it for me on the cheap, I'd appreciate it!