I have 3 packages of p13 batteries that I can't use. Also a set of front ceramic brake pads I ran a short time. The pads are "BrakeBest" part # D924 and are for a 2012 GMC Terrain. They are like new. Probably fit lots more but don't know which ones. First email with address can have them. Specify which one. Can I send the batteries in a regular envelope?

I am NOT in for the karma, but asking for clarification: The p13 batteries, are these size 13 hearing aid batteries?

I recently upgraded my Costco hearing aids from Rexton, that used 13, to Kirkland, which use 312.

Yes