{"product_id":"bio-tek-instruments-rf303-analyzer-replacement-battery-12v-2300mah-sealed-lead-acid","title":"BIO-TEK INSTRUMENTS RF303 Analyzer 12V Replacement Battery 2300mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBIO-TEK INSTRUMENTS RF303 Analyzer — 12V Sealed Lead Acid Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V, 2300mAh (27.6Wh) sealed lead-acid replacement battery for the BIO-TEK INSTRUMENTS RF303 Analyzer, Index 2F2, and SPO2 Simulator. The RF303 is a medical-grade microplate reader used in clinical and research laboratories for absorbance-based sample analysis. When the original cell degrades, this replacement restores instrument power and allows the device to complete its internal diagnostic routines.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRF303, Index 2F2, and SPO2 Simulator compatibility:\u003c\/strong\u003e\n    These instruments share the same 12V internal power rail, physical footprint (178 × 66.6 × 35mm), and sealed lead-acid chemistry requirement. The BMS in each device expects SLA charge characteristics — substituting lithium chemistry will cause charge faults.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through full charge and discharge on SLA-compatible test equipment. The BMS accepted the charge profile cleanly, voltage held steady across the load curve, and the cell reached rated capacity by the second cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the RF303 complete its full power-on self-test without interruption. Medical instruments run a BMS verification sequence at startup — cutting power mid-sequence triggers a false battery fault that persists 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\"\u003eRF303 not completing boot sequence after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe RF303 runs a power-on self-test that includes a battery verification step. A freshly installed SLA cell may not immediately pass this check because the BMS is comparing resting voltage against an OEM-calibrated threshold. New cells often sit slightly below 12.6V after shipping. Charge the battery to full before first installation — a fully charged SLA cell rests at approximately 12.6–12.8V open circuit — and then allow the boot sequence to complete without powering down.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRF303 alarming low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the BMS has not yet completed its learn cycle on a new cell. The charge indicator may show full, but the BMS applies a conservative capacity estimate until it records one complete charge-discharge cycle. Run one full discharge under normal instrument use, then recharge to 100% before clinical use. After that cycle, the low-battery threshold aligns correctly and the alarm clears.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381386772570,"sku":"BWCS-SHT160MD-1","price":310.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381386805338,"sku":"BWCS-SHT160MD-2","price":370.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381386838106,"sku":"BWCS-SHT160MD-3","price":415.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SHT160MD-1.webp?v=1778900511","url":"https:\/\/batteryweb.com\/products\/bio-tek-instruments-rf303-analyzer-replacement-battery-12v-2300mah-sealed-lead-acid","provider":"BatteryWeb","version":"1.0","type":"link"}