{"product_id":"nihon-kohden-opv-1500-vital-signs-monitor-replacement-battery-96v-2100mah-ni-mh","title":"Nihon Kohden NKB-302 9.6V Replacement Battery 2100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNihon Kohden OPV-1500 Vital Signs Monitor — 9.6V Ni-MH Replacement Battery (NKB-302)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 2100mAh Ni-MH battery for the Nihon Kohden OPV-1500 Vital Signs Monitor and Life Scope N OPV-1500 series. It replaces OEM part numbers NKB-302, OM11437, X064, and B11437. Physical dimensions are 67.50 × 50.30 × 33.86mm — confirm clearance before fitting.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOPV-1500 and Life Scope N series fit:\u003c\/strong\u003e\n    The OPV-1500, OPV-1500K, and Life Scope N share a common battery bay, BMS handshake protocol, and 9.6V rail. All variants listed above accept this cell without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through full charge and discharge on the OPV-1500 platform. The BMS accepted the cell on first connection, completed its verification sequence, and held voltage within spec across the load profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test procedure:\u003c\/strong\u003e\n    After inserting this battery, let the monitor complete its full power-on self-test without interruption. The OPV-1500 runs a BMS verification routine at startup — cutting power during this sequence logs a battery fault that persists until a clean reboot cycle clears it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOPV-1500 not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe OPV-1500 runs a self-test during every boot that includes a battery verification step. On a new Ni-MH cell that has not yet completed its first full charge-discharge cycle, the BMS may not recognise the cell's state-of-charge signature and halt the boot. This is not a faulty battery — the cell simply has not yet been characterised by the monitor's charge IC. Run one complete charge cycle from a discharged state before placing the unit in clinical rotation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator stalling below 100% on first charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOn first charge, the OPV-1500's charge IC applies a conservative current limit to an uncharacterised Ni-MH cell. This causes the charge indicator to plateau between 80–90% for an extended period before either completing or stopping early. The cell is not defective — the charge controller is applying a reduced rate until it can map the cell's delta-V termination point. Allow the unit to remain on charge until the indicator clears, or complete a second charge cycle if the first terminates early. After two full cycles, the charge IC locks onto the correct termination voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381467086938,"sku":"BWCS-NPV150MD-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381467119706,"sku":"BWCS-NPV150MD-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381467152474,"sku":"BWCS-NPV150MD-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NPV150MD-1.webp?v=1778901067","url":"https:\/\/batteryweb.com\/products\/nihon-kohden-opv-1500-vital-signs-monitor-replacement-battery-96v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}