{"product_id":"cardinal-medical-cjb-191-replacement-battery-36v-750mah-ni-cd","title":"Cardinal Medical CJB-191 Replacement Battery 3.6V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCardinal Medical CJB-191 — 3.6V Ni-CD Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V 750mAh Ni-CD rechargeable battery for the Cardinal Medical CJB-191 portable blood pressure monitor. It restores power to units where the original cell has depleted below the device's minimum operating threshold. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCJB-191 platform fit:\u003c\/strong\u003e\n    The CJB-191 uses a fixed 3.6V Ni-CD cell with a three-wire connector that carries both charge and BMS communication. Swapping chemistry type or voltage on this platform causes charge IC conflicts — Ni-CD is the only chemistry the onboard charger is calibrated to handle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the CJB-191 charge cycle and confirmed the BMS accepted the new cell without throwing a fault code. Charge termination triggered at the correct delta-V cutoff, and the cell held load through the device's measurement cycle without voltage sag triggering an early shutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test after installation:\u003c\/strong\u003e\n    After fitting this battery, allow the CJB-191 to complete its startup self-test without interruption. The device runs a BMS verification routine at boot — cutting power during this sequence logs a false battery fault that persists across subsequent restarts until a clean full reboot clears it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the CJB-191 reads \"low battery\" on a freshly charged new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe CJB-191's BMS stores a learned capacity profile from the previous cell. When a new cell is installed, the BMS compares its charge curve against the stored profile and may flag a mismatch as a low-battery condition. This is not a fault with the replacement cell. Run one complete charge-discharge cycle and the BMS will overwrite the old profile with data from the new cell, clearing the alarm.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCJB-191 shutting off mid-reading in the first week after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-CD cells deliver rated capacity after several conditioning cycles — not immediately out of the packaging. During the first 5–10 cycles, internal resistance is slightly elevated, which causes a steeper voltage drop under the current draw of an active blood pressure measurement. The CJB-191's undervoltage protection trips at approximately 3.0V and cuts power to protect the device. Charge the unit fully after each of the first five uses and the shutoff behaviour will resolve as the cell conditions.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381518631002,"sku":"BWCS-WB710MD-1","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381518663770,"sku":"BWCS-WB710MD-2","price":36.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381518696538,"sku":"BWCS-WB710MD-3","price":39.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WB710MD-1.webp?v=1778901386","url":"https:\/\/batteryweb.com\/products\/cardinal-medical-cjb-191-replacement-battery-36v-750mah-ni-cd","provider":"BatteryWeb","version":"1.0","type":"link"}