{"product_id":"simonson-wheel-defibrillator-defi2-replacement-battery-12v-2000mah-ni-mh","title":"Simonson-Wheel Defi2 Defibrillator 12V Replacement Battery 110079","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSimonson-Wheel Defibrillator Defi2 — 12V Ni-MH Replacement Battery (110079)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 2000mAh Ni-MH replacement battery for the Simonson-Wheel Defibrillator Defi2. It matches OEM part number 110079 and fits directly into the Defi2 chassis. Capacity is rated at 24Wh from the product data — do not rely on third-party listings that differ.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDefi2 voltage and connector match:\u003c\/strong\u003e\n    The Defi2 BMS handshakes at 12V and expects the Ni-MH charge curve. A lithium cell at this form factor would trigger a persistent battery fault because the charge IC reads the wrong voltage ramp. This replacement uses the correct chemistry so the charge controller tracks the cell accurately.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through the Defi2 power-on sequence and confirmed the BMS accepted the cell without fault flags. The charge indicator stepped through its full sequence and the self-test completed without interruption.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol for the Defi2:\u003c\/strong\u003e\n    After installing this battery, let the Defi2 complete its full power-on self-test without cycling the power switch. The device runs a BMS verification at startup — cutting power mid-sequence stores a false battery fault that persists 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\"\u003eSelf-test failure after battery swap on the Defi2\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Defi2 runs a charge and load verification during its self-test cycle. A new Ni-MH cell has not yet completed a full charge-discharge cycle, so the BMS learn routine may log a marginal result on the first pass. This is a calibration state, not a faulty battery. Run one complete charge cycle — charge to full, then allow the device to discharge through normal standby — before using the unit clinically. After that cycle, the BMS has enough data to pass the cell cleanly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDefi2 showing low battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Defi2 alarm threshold is calibrated to the OEM cell's internal resistance signature. A new replacement cell has a slightly different resistance profile until it's been cycled. The BMS reads this as a borderline state-of-charge and triggers the alarm even when the cell is fully charged. Run one full charge-discharge cycle and recharge to 100% — the internal resistance normalises and the alarm threshold passes correctly. Check the charge indicator reaches its final stage, which on the Defi2 corresponds to a terminal cell voltage of approximately 13.8V on a 12V Ni-MH pack.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381420228698,"sku":"BWCS-SWD200MD-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381420261466,"sku":"BWCS-SWD200MD-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381420294234,"sku":"BWCS-SWD200MD-3","price":98.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SWD200MD-1.webp?v=1778900681","url":"https:\/\/batteryweb.com\/products\/simonson-wheel-defibrillator-defi2-replacement-battery-12v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}