Help Peter with his hearing aid batteries

Hi, I am Peter. I am known for my hearing problems. Without my hearing aid, I hear zero percent. This is a big problem because I am a musician. Today the batteries for my hearing aid broke. This is the last remedy for me to hear at least some percent.
 
I need your help funding these as I didn't calculate this and insurance doesn't help. The costs for new hearing aid batteries are 400€ incl shipping and taxes. I really want to make music again, and hear the birds in the morning.