{"product_id":"physio-control-lifepak-9-replacement-battery-16v-2500mah-sealed-lead-acid","title":"Physio-Control Lifepak 9 Replacement Battery 16V 2500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhysio-Control Lifepak 9 Series — 16V Sealed Lead Acid Replacement Battery (803704-03)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 16V, 2500mAh sealed lead-acid replacement battery for the Physio-Control Lifepak 9, 9A, 9B, and 9P portable defibrillators. It replaces OEM part numbers 803704-03 and 21300-002259. Voltage and capacity match the original specification from the product data.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLifepak 9 series compatibility:\u003c\/strong\u003e\n    The 9, 9A, 9B, and 9P share the same 16V battery rail, connector footprint, and BMS handshake protocol. One battery covers all four variants without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through a charge-discharge sequence and monitored the BMS handshake at startup. The self-test completed cleanly and the charge IC accepted the cell without flagging a chemistry mismatch.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After swapping this battery in, let the Lifepak 9 complete its full power-on self-test without interruption. The BMS runs a verification sequence at startup — cutting power mid-cycle triggers a false battery fault that latches until the next clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Lifepak 9 fails its self-test after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Lifepak 9 runs an internal self-test at every power-on that checks battery voltage against a stored threshold. A freshly installed sealed lead-acid cell that has not completed one full charge-discharge cycle may sit at a resting voltage that falls just short of that threshold. The BMS has no way to distinguish a partially charged new cell from a degraded old one — it reads voltage, not cycle history. Run one complete charge before placing the unit back in service, and the self-test will pass on the next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator not reaching 100% on the first charge after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is normal behaviour for a new sealed lead-acid cell on its first charge cycle. The charge IC in the Lifepak 9 applies a conservative current limit when it does not recognise a cell with an established charge history, which causes the indicator to plateau before reaching the full-charge state. The cell needs one complete charge-discharge cycle before the charge IC recalibrates its endpoint. After that first full cycle, the indicator should reach 100% and hold there at a resting voltage of approximately 13.5–13.8V open circuit.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381490679898,"sku":"BWCS-MPD910MD-1","price":427.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381490712666,"sku":"BWCS-MPD910MD-2","price":510.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381490745434,"sku":"BWCS-MPD910MD-3","price":572.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MPD910MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/physio-control-lifepak-9-replacement-battery-16v-2500mah-sealed-lead-acid","provider":"BatteryWeb","version":"1.0","type":"link"}