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I had excellent results from the Energizer "E2 Titanium AA" cells. I put a pair in my HVAC thermostat in 2001 and kinda forgot it has batteries in it until last summer. Expecting to see some leakage I took it off the wall and all was clean. Tested the battery voltage and they still had about 1.4V per battery. They had an expiration date in 2007. I think I got my moneys worth! Seems they quit making those when I tried to find more.
BTW I've had NiMH leak too.
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