OnSite and FRx Battery $189.00 Disposable, lithium manganese dioxide, long-life battery with a five-year shelf life plus a (typical) four-year installed life. OnSite and FRx Battery quantity Add to cart Description Additional Information Need Help? Contact Us Leave Feedback Contact Us info@emergencyskils.com Leave Feedback Enter your feedback modal content here. (Text/HTML/Shortcodes accepted). Share