{"product_id":"cardiac-science-9001-replacement-battery-12v-1800mah-ni-mh","title":"Cardiac Science 9001 Powerheart G3 AED Compatible Battery 12V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCardiac Science Powerheart G3 AED (9001 \/ 9004) — 12V 1800mAh Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 12V, 1800mAh Ni-MH battery replaces the internal power cell in the Cardiac Science Powerheart G3 AED, covering fit models 9001 and 9004. The G3 is a public-access automated external defibrillator — this battery keeps it ready to deliver defibrillation therapy. At 21.6Wh, the capacity matches the original cell specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eG3 AED platform compatibility (9001 and 9004):\u003c\/strong\u003e\n    Both models share the same 12V battery bay, connector pinout, and BMS handshake protocol. The G3's charge controller reads cell chemistry to set the charge termination point — Ni-MH cells use delta-V detection, not a fixed voltage cutoff, so fitting a mismatched chemistry will cause the BMS to misread capacity and flag a fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the G3's power-on self-test sequence. The BMS completed charge verification and self-test without flagging a fault. Charge termination triggered cleanly via delta-V at the expected cell temperature rise, confirming correct chemistry recognition.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the G3 complete its full power-on self-test cycle without interruption. The device runs a BMS verification pass at startup. Interrupting it — even briefly — can latch a false battery fault that persists until the unit is powered down and rebooted from scratch.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Powerheart G3 flags a battery fault on a freshly installed cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe G3's BMS uses a delta-V charge curve to verify that the installed cell behaves like a healthy Ni-MH pack. A new cell that has been in storage for several months may have an uneven charge state across its sub-cells, causing the delta-V signal to appear early or erratically. The BMS interprets this as a failing cell and raises a fault before the battery is ever depleted. Running one full charge-discharge cycle through the G3 allows the BMS to calibrate its thresholds to the actual cell profile and clears the fault on the next boot.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eG3 not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the G3 stalls mid-boot or loops back to the startup screen after a battery replacement, the cell voltage has likely dropped below the BMS recovery threshold during storage — typically below 10.5V on a 12V Ni-MH pack. At that level, the G3's charge controller may refuse to initiate a charge cycle, treating the cell as unrecoverable. Connect the unit to mains power and hold the power button for 10 seconds to force the charger into a recovery trickle-charge mode. Once cell voltage climbs above 10.8V, the normal charge cycle resumes and boot will complete.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381467873370,"sku":"BWCS-CBP308MD-1","price":105.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381467906138,"sku":"BWCS-CBP308MD-2","price":121.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381467938906,"sku":"BWCS-CBP308MD-3","price":133.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CBP308MD_1.webp?v=1778901051","url":"https:\/\/batteryweb.com\/products\/cardiac-science-9001-replacement-battery-12v-1800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}