{"product_id":"biomedical-crossvent4-replacement-battery-72v-5000mah-ni-mh","title":"Biomedical Crossvent4+ 7.2V Replacement Battery 5960","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBiomedical Crossvent 4+ Series — 7.2V Ni-MH Replacement Battery (5960)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.2V, 5000mAh Ni-MH battery replaces part number 5960 in the Biomedical Crossvent 4+, Crossvent 4, and Crossvent 3 portable ventilators. It also fits PRT4402-designated units. Capacity is rated at 36Wh and matches the OEM cell specification for this ventilator platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCrossvent platform compatibility:\u003c\/strong\u003e\n    The Crossvent 3, 4, and 4+ share the same 7.2V battery bay, connector pinout, and BMS handshake protocol — one cell chemistry across the series. Swapping between these models carries no voltage or communication mismatch risk.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Crossvent 4+ charge-discharge sequence and confirmed the BMS accepted the new cell without fault flags after one full conditioning cycle. Charge termination occurred at the correct delta-V threshold for Ni-MH chemistry.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test protocol:\u003c\/strong\u003e\n    After installing this battery, allow the ventilator to complete its full startup self-test without interruption. The device runs a BMS verification routine at boot — cutting power during this window causes a battery fault flag 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\"\u003eCharge indicator not reaching 100% on the first charge cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Ni-MH cells arrive partially discharged from storage. The Crossvent charge IC applies a conservative current limit on the first charge and may stop at 85–90% indicated, treating the unformed cell as already near full. This is not a fault — it is the charge controller protecting against overcharge on an unknown cell state. Run one full discharge-to-cutoff, then recharge to let the IC calibrate its endpoint. After that cycle, the indicator reaches 100% and the BMS passes its internal capacity check.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice shutting off unexpectedly during the first ten use cycles\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells deliver lower sustained voltage under load before they are fully formed. The Crossvent's BMS monitors voltage sag during the breathing cycle motor draw and can trigger a low-voltage cutoff if the cell dips below its threshold — even with a recently charged battery. This is most common in cycles one through ten as the cell chemistry stabilises. Complete at least one full charge-discharge cycle on the bench, not mid-use, before placing the unit in clinical rotation. After conditioning, resting voltage should read between 7.8V and 8.4V after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381381955674,"sku":"BWCS-BMC210MD-1","price":88.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381381988442,"sku":"BWCS-BMC210MD-2","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381382021210,"sku":"BWCS-BMC210MD-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BMC210MD-1.webp?v=1778900493","url":"https:\/\/batteryweb.com\/products\/biomedical-crossvent4-replacement-battery-72v-5000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}