Instagram post where you can WIN a PowerUp Advance from Modmatic: https://www.instagram.com/p/BtNIUZKl907/
PowerUp Advance (rechargeable battery mod) from Modmatic: https://modmatic.io/products/powerup-advance?item=APU-001-FL
Installation guide from Modmatic: https://www.youtube.com/watch?v=sIAM0U5GTAQ
Backlit screen mod with custom shell from God of Gaming: https://godofgamingshop.com/collections/game-boy-advance/products/game-boy-advance-shell
Backlit screen mod instructions from Rose Colored Gaming: https://rosecoloredgaming.files.wordpress.com/2013/11/gba-back-light-instructions-v41.pdf
Audio mod from Retro Modding: https://www.retromodding.com/products/gameboy-advance-audio-amplifier
GBA overclocking guide from modd3d.com: http://www.modd3d.com/articles/item/overclock-your-game-boy-advance
mintyPi v3 (pre-orders currently still open): http://www.sudomod.com/mintypi-v3/