Not strong enough for the rechargeable battery mod. It could also be that the GBC needs to be re-capped but I used a generic USB-C charge board and there is significant hum that's still there. It drastically reduced the hum, but the hum is still there with the USB-C charge board. https://www.amazon.com/Lithium-Battery-Charging-Protection-Functions/dp/B07MDPLQ18 for reference.
Removed the hum I was getting while changing TFT brightness with an aftermarket speaker. Watch a video on replacing surface mount capacitors and make sure you are comfortable doing it before you order. Its not complicated, but the small size makes it a challenge if you have shaky hands like me.
If you are upgrading the screen of your GBC to a backlit LCD you might get a hum from the speaker like i did. This part fixes that hum and now there isnt any noise other the then game i play, Must buy