Philips HeartStart HS1 and FRx battery

Fresh-dated for maximum life, this long-life lithium battery comes with 4-year factory warranty. Philips brand AEDs operate on batteries only. It is recommended to always have a fully charged spare. Philips replacement 4-Year Battery for the FRx, OnSite, and HS1 AED models. Delivered to you with Philips' 4-year warranty and 200+ shock capacity, just like your original battery pack.