I hadn’t used my noise-canceling headphones in a while and found its battery was dead. When I went to replace the battery, I also found corrosion. It took me around thirty minutes to get that stubborn little green light to come back on, but they’re now working perfectly once again.
Here’s what I did (several times) in case it helps someone else:
- Dipped Q-tips in isopropyl alcohol and rubbed the positive and negative contacts inside the battery compartment
- Dipped Q-tips in water and rubbed the contacts again
- Used a dry Q-tip and dried the contacts as much as I could
- Sprayed air into the battery compartment with a power duster spray
- I dug a toothpick into the middle of the positive contact and blindly scratched away
- Used another toothpick to scratch away at the negative contact
- Sprayed it with some more air
Don’t give up too soon!