Battery Guide -- Battery types, pros & cons, comparisons ...
Which battery should I use? To make it simple, you can just use EBL NiMH batteries (which are good for just about any purpose, reliable, and priced right), along with a good charger. For smoke alarms, use either the Lithium brands that are marked "7-year" or "10-year", or if you want a rechargeable, see my smoke alarms page for details and warning.
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