I asked SkyDoc and have it on a reconditioning cycle on my charger now. My question is... I bought a AGM a couple yrs ago (not sure how long or where from) to put on the shelf for a shop battery. It got pushed to the back and forgotten. It was on a shelf in my cellar and shouldn't have froze but temps would have gone up and down quite a bit. Guessing between 35 and 70 degrees. Thing is when I pulled it off the shelf yesterday it was dead. It shows 0.1 volts now. GONE? It is possible door got left open for a while in cold weather and it was on bottom shelf. Could have froze?? Any ideas?