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If you're the owner of a Philips HeartStart OnSite or Home AED, then you know how important it is to keep your device in good working order. That's why we carry a selection of replacement batteries specifically designed for these units. Whether you need a spare battery to keep on hand or you're looking to do a quick swap, we've got you covered.Our Philips HeartStart FRx AED Batteries are high-quality and designed specifically for use with Philips HeartStart OnSite and Home AEDs. With a four-year shelf life, these batteries will be ready when you need them. And because they're easy to install, you can get back up and running as soon as possible.