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What's the best 9 volt alkaline battery for smoke detectors?
We love the Energizer Industrial EN22 for smoke detectors - it's one of the most reliable 9 volts you can buy and we can get it for you at an unbeatable price. For tougher spots you might want to pick an L522 9V lithium battery so you don't have to get up on a ladder every 6 months. Read more about the best 9 volt smoke alarm batteries you can buy.