GUARANTEED FOR 5 YEARS IN STORAGE – Duracell guarantees each Coppertop 9-Volt alkaline battery to last 5 years in storage, so you can be confident these batteries will be ready when you need them ...

Product Features. Duracell 9V Batteries: The Duracell CopperTop 9 Volt alkaline battery is designed for use in household items like garage door openers, smoke detectors, and more ...

Components include two breadboards, one for 1.5-volt batteries and one for 9-volt, six motor fans that can be arranged conveniently either in series or in parallel, a switch for each circuit, one ...

It's true that a lithium 9-volt battery will probably last longer than an alkaline 9V (which in turn should last longer than a carbon-zinc 9V). But how much longer depends on a smoke alarm's power ...