Likely you have thought of this if you have access, but if not here it goes. At my place of employment there are several used battery bins. I recently decided to check out if/how many of these might be useful for light use. I used primarily AAA lights, so I have acquired about 50 of these. Of those, roughly half are 1.2V or lower, which I decided not to deal with. The remainder, 3 or basically new at 1.6+, a couple of 1.5+v, roughly 12 in the 1.4+V range, and several 1.3+V ones. I saved a couple of the 1.2V ones and basically kept about 1/2 the lot. If the batteries did not decay over time, basically a several year supply. Guessing only the 1.4V or better are good for utilizing high of my lights, which I rarely do, so all in all not a bad way to spend a few minutes.
Anyway, some thing to consider if you consider using alkaline batteries, if not then no need to comment . . .
Along those lines, I was surprised how few of all the batteries in the bins showed any signs of leaking. Including those who measured down in the 0.3 to 0.8V range.