{"product_id":"carefusion-oxygen-generator-replacement-battery-333v-4000mah-li-ion","title":"CareFusion 24250-001 Oxygen Generator Compatible Battery 33.3V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCareFusion Oxygen Generator REF24250-001 — 33.3V Li-ion Replacement Battery (24250-001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 33.3V 4000mAh (133.2Wh) lithium-ion battery for the CareFusion portable oxygen concentrator, OEM reference 24250-001 and 28209-001. It fits the REF24250-001 series oxygen generator used in portable respiratory therapy. Voltage and capacity match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eREF24250-001 platform compatibility:\u003c\/strong\u003e\n    These CareFusion oxygen concentrators share a common 33.3V battery rail and BMS handshake protocol across the REF24250-001 series. The connector pinout and communication lines are identical across units in this range, so one battery cell services the full platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through a full charge-discharge sequence on a CareFusion concentrator bench unit. The BMS completed its verification handshake without fault flags, and the charge IC accepted the cell through all stages without triggering a chemistry mismatch error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the device complete its full startup self-test without interruption. CareFusion concentrators run a BMS verification routine at power-on. Cutting power during this sequence causes the device to log a false battery fault that persists until the next clean reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the REF24250-001 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CareFusion BMS uses a learned capacity threshold calibrated to the OEM cell's charge curve. A new replacement cell has a slightly different initial voltage curve, and on the first cycle the BMS can flag it as below threshold even at full charge. This is not a fault with the battery — it is the BMS comparing an unfamiliar charge profile against its stored OEM reference. Run one complete charge-discharge cycle and the BMS recalibrates its threshold to the new cell. After that single cycle, the alarm clears and the charge indicator reads correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOxygen concentrator will not power on after battery was stored before installation\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLithium-ion cells self-discharge during storage. If this battery sat long enough before installation, its resting voltage may have dropped below the CareFusion BMS recovery threshold — typically around 2.5V per cell — causing the BMS to lock out power delivery entirely. Connect the battery to a known-good CareFusion charger and leave it for at least 30 minutes before attempting to power on the device. The charge IC will apply a trickle pre-charge to bring cell voltage above the lockout threshold, after which normal charging and device startup resume. If the unit still will not power on, check cell voltage directly — it should read above 27V before the BMS will release the lockout.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381356855386,"sku":"BWCS-CFG282MD-1","price":228.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381356888154,"sku":"BWCS-CFG282MD-2","price":272.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381356920922,"sku":"BWCS-CFG282MD-3","price":304.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CFG282MD_1.webp?v=1778900174","url":"https:\/\/batteryweb.com\/products\/carefusion-oxygen-generator-replacement-battery-333v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}