{"product_id":"kejian-jaundice-meter-kj-8000-replacement-battery-48v-500mah-ni-mh","title":"Kejian Jaundice Meter KJ-8000 Compatible Battery 4.8V 500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKejian Jaundice Meter KJ-8000 — 4.8V Ni-MH Replacement Battery (2\/3AAS4)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 500mAh Ni-MH replacement battery for the Kejian KJ-8000 jaundice meter. The KJ-8000 is a non-invasive bilirubin screening device used in neonatal and clinical settings to detect hyperbilirubinemia. It matches the OEM part number 2\/3AAS4 and fits directly into the KJ-8000 battery compartment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eKJ-8000 compatibility:\u003c\/strong\u003e\n    The KJ-8000 runs a 4.8V Ni-MH cell pack — four series cells at 1.2V each. This replacement matches that voltage rail and cell format exactly. The BMS in the KJ-8000 does not require a proprietary handshake, so the meter accepts this cell pack without pairing steps.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through a full charge-discharge cycle on the KJ-8000 bench unit. The BMS accepted the cell, the power-on self-test completed without fault flags, and the meter advanced to operational mode normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the KJ-8000 complete its full power-on self-test without switching it off mid-sequence. The device runs a BMS verification at startup. Interrupting that sequence before it finishes causes a battery fault flag that sticks 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 KJ-8000 flags a battery fault on a fully charged new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe KJ-8000 charge IC applies a conservative acceptance threshold calibrated to a conditioned OEM cell. A new Ni-MH pack fresh out of packaging has not yet completed its first full electrochemical cycle, so its internal resistance reads slightly outside the meter's expected range. The BMS interprets this as a marginal or faulty cell rather than a new one. One full charge-discharge cycle normalises the cell's internal resistance profile, and the fault clears on the subsequent startup.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eKJ-8000 not powering on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–3% per day under typical storage conditions. If the replacement battery sat unused long enough, the pack voltage can drop below the KJ-8000's BMS recovery threshold — typically around 4.0V for a 4.8V nominal pack. When the meter sees a voltage that low on startup, it interprets the pack as failed and refuses to boot rather than attempt a deep-discharge recovery. Place the battery in a Ni-MH compatible charger externally until the pack reaches at least 4.4V, then reinstall and power on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381425307738,"sku":"BWCS-MKJ800MD-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381425340506,"sku":"BWCS-MKJ800MD-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381425373274,"sku":"BWCS-MKJ800MD-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MKJ800MD-1.webp?v=1778900661","url":"https:\/\/batteryweb.com\/products\/kejian-jaundice-meter-kj-8000-replacement-battery-48v-500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}