TLDR: Don't trust name-brand high-performance alkaline batteries such as Duracell and Energizer. In recent years, manufacturers have been optimizing for performance and leaving out crucial anti-leak features. The result is corroded battery compartments left and right.
The fix? Go over to rechargeable NiMH batteries wherever possible; I recommend Eneloops. The modern low self-discharge versions hold up for at least a year, and I have yet to see one leak. The downside is that they usually have a slightly lower output voltage. In the few cases where it matters, use slightly down-market alkaline batteries from Kodak, Sunbeam, Fuji, Sony, etc.
I'm still cranky about that good Fluke multimeter I lost last summer to a set of leaking Duracells. Later this weekend I'm going on a search-and-replace run through the household.
ps, months later: Missed the Duracells in the thermostat, so $185 to have that replaced. Seriously, rid your home of these cursed objects now.
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