Quote:
Originally Posted by Long Jon
.... NON rechargeable Energiser LITHIUM batteries are practically immortal !
....Long long shelf life, Never leak. Worth the extra, (forget re-chargeables they generally don't hold the full voltage very long, v poor performance , spend more time on the charger than in the appliance....
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Lithium batteries are used in smoke detectors for that very reason-- years of shelf life, and a smoke detector is basically a trickle demand. Lithium's can be a bit larger and more square-ish than some 9V cells, so can be a tight fit in certain battery holders. I use lithium batteries in certain test equipment left outdoors because they don't have a voltage drop at low temperatures (a trick learned from an Iditarod musher for his headlamps and GPS).
Rechargeable batteries (NiCd for example) are 1.2V per cell, whereas most non-rechargeable types are 1.5V per cell. So a full rechargeable battery starts at 80% compared to an alkaline battery.