Hello Everyone, This is my first post in this thread. I know next to nothing about this subject but I have some batteries some of you may be able to use. I work in facilities for a large investment company and we replace the back-up batteries in fire alarm panels, emergency generator control panels and other critical equipment every three years. So, I have about ten 12 volt, 7.0 amp. hr. batteries that are three years old. They have been in a climate controlled environment during that time. They are Power-Sonic model PS-1270 F2. You can get all the details at the manufacturers websight:
http://www.power-sonic.com/ I don't know how long they will last, but we replace them while they are still good.
These batteries are free to anyone who can use them and can arrange to meet me to pick them up in/around Kansas City, Missouri. I may consider shipping them if you are willing to pay the shipping cost.