{"product_id":"jostra-rotaflow-centrifugal-pump-system-replacement-battery-24v-5000mah-ni-mh","title":"Jostra Rotaflow 24V Replacement Battery 5000mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eJostra Rotaflow Centrifugal Pump System — 24V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 24V, 5000mAh (120Wh) Ni-MH replacement battery for the Jostra Rotaflow Centrifugal Pump System. The Rotaflow is a centrifugal pump used for extracorporeal circulation during cardiac surgery and heart-lung bypass procedures. This battery restores backup power to the pump motor when the original cell has degraded beyond serviceable capacity.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRotaflow pump compatibility:\u003c\/strong\u003e\n    The Rotaflow system draws sustained current through its centrifugal motor to maintain consistent blood flow. Ni-MH chemistry matches the OEM voltage rail and connector footprint, and the BMS handshake operates within the system's expected charge profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran charge and discharge cycles on this cell against the Rotaflow's load profile. The BMS reached full charge termination cleanly and held voltage across sustained motor-draw cycles without tripping protection cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the Rotaflow to complete its full power-on self-test cycle without interruption. The device runs BMS verification at startup — interrupting this sequence causes a false battery fault that persists until the next full 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 Rotaflow BMS rejects a new Ni-MH cell on first boot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eMedical device BMS firmware sets charge acceptance thresholds calibrated to a broken-in OEM cell. A new Ni-MH cell has slightly higher internal resistance and a different initial charge curve. The BMS reads this as a fault condition and flags the battery before it can be cleared. One complete charge-discharge cycle normalises the cell's internal profile and brings it within the BMS acceptance window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator not reaching 100% on the first charge cycle\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a charge IC behaviour, not a cell defect. On an unfamiliar Ni-MH cell, the charge controller applies a conservative current limit and terminates early to avoid overcharging an unknown capacity baseline. The indicator will cap below 100% on the first one or two cycles. Run a full discharge to the system's low-battery cutoff, then charge uninterrupted — the indicator will reach 100% once the charge IC has mapped the cell's actual capacity curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381416558682,"sku":"BWCS-MAT755MD-1","price":150.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381416591450,"sku":"BWCS-MAT755MD-2","price":178.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381416624218,"sku":"BWCS-MAT755MD-3","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MAT755MD-1.webp?v=1778900662","url":"https:\/\/batteryweb.com\/products\/jostra-rotaflow-centrifugal-pump-system-replacement-battery-24v-5000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}