Sirex
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So, back when I worked at Xerox, we could order supplies, like gloves, towels, cleaners, etc., to be shipped to us for our carstock. When I saw the writing on the wall, as many of us did, I ordered batteries, AA batteries to be specific. Energizer Lithium AA batteries, from 2002, expiration date of 2013. I just found a stash of them in a basement storage room, still sealed and decided to test them. Every single one still at 1.7v. They are also very light weight. I just bought a EoTech 512, the one that takes AA batteries, and am buying some new AA Energizer Lithium batteries for it. I just figured if anyone was interested in long term battery storage for small items, they seem to keep their charge a long time. I haven't done a drain test, but plan to hopefully soon with my son's R/C cars.