I usually use rechargeables for everything, but the shelf life on these is exceptional. They outlast alkaline disposables and Lithium Ion and nickel metal hydride rechargeables -- great for smoke detectors. They also operate well at extremely low temperatures, so they're great for car flashlights/warning lights, outdoor weather sensors, etc., especially in climates like New England (they operated well at sub-zero temps this winter where NiMH and alkalines failed). Expensive, but worth it for certain applications.
I usually use rechargeables for everything, but the shelf life on these is exceptional. They outlast alkaline disposables and Lithium Ion and nickel metal hydride rechargeables -- great for smoke detectors. They also operate well at extremely low temperatures, so they're great for car flashlights/warning lights, outdoor weather sensors, etc., especially in climates like New England (they operated well at sub-zero temps this winter where NiMH and alkalines failed). Expensive, but worth it for certain applications.