{"product_id":"alcon-autokeratometer-replacement-battery-6v-400mah-ni-cd","title":"Alcon Autokeratometer 190-009 Replacement Battery 6V 400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlcon Autokeratometer \/ KeratoMeter — 6V Ni-CD Replacement Battery (190-009)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V, 400mAh Ni-CD replacement battery for the Alcon Autokeratometer, KeratoMeter, and Laboratories Renaissance. It replaces OEM part numbers 190-009, B10935, and OM10935. The battery powers the instrument's optical and electronic subsystems during corneal curvature and refractive measurements.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAutokeratometer \/ KeratoMeter \/ Laboratories Renaissance fit:\u003c\/strong\u003e\n    These instruments share the same 6V battery rail, connector footprint, and BMS handshake profile. A single cell format at 85.50 × 29.00 × 14.50mm fits all three without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the Alcon BMS handshake sequence. The BMS accepted the new cell after one full charge-discharge pass and cleared the low-battery flag on the second startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the device complete its full startup self-test without interruption. The Alcon BMS runs a verification pass at boot — cutting power mid-sequence leaves a false battery fault latched in firmware until the next clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Alcon Autokeratometer runs a BMS verification routine at power-on that checks resting cell voltage against a stored threshold. A fresh Ni-CD cell that has not yet completed its first full cycle can sit below this threshold even after a full charge, because the charge IC applies a conservative ceiling on new cells. The device interprets this as an unqualified cell and halts the boot sequence. Run one complete charge-discharge cycle before placing the instrument back into clinical use — resting voltage should read at or above 6.0V for the BMS to clear the boot check.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow-battery alarm triggering immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens because the BMS compares cell voltage under load against a threshold calibrated for a conditioned Ni-CD cell. A new, uncycled cell shows higher internal resistance, causing voltage to sag under the instrument's optical and electronic load — enough to trigger the alarm even at full charge state. It is not a faulty cell. Run the battery through one full charge-discharge cycle on the instrument itself. After that conditioning pass, the voltage sag under load drops within threshold and the alarm stops triggering.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381380710490,"sku":"BWCS-ABM190MD-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381380743258,"sku":"BWCS-ABM190MD-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381380776026,"sku":"BWCS-ABM190MD-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABM190MD_1.webp?v=1778900492","url":"https:\/\/batteryweb.com\/products\/alcon-autokeratometer-replacement-battery-6v-400mah-ni-cd","provider":"BatteryWeb","version":"1.0","type":"link"}