{"product_id":"biolight-blt-1203a-replacement-battery-12v-1700mah-li-ion","title":"Biolight BLT-1203A Compatible Battery 12V 1700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBiolight BLT-1203A Vital Signs Monitor — 12V Li-ion Replacement Battery (BAT-120002)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 12V, 1700mAh Li-ion battery is a direct replacement for the Biolight BLT-1203A patient monitor. It fits the BLT-1203A Vital Signs Monitor used in hospitals and clinics to track heart rate, SpO2, and blood pressure. Capacity matches the original BAT-120002 specification at 20.4Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBLT-1203A platform fitment:\u003c\/strong\u003e\n    The BLT-1203A series uses a fixed 12V rail with a BMS that handshakes on connector pin count and chemistry type. This cell matches that profile — voltage, connector layout, and Li-ion chemistry all align with what the monitor expects at startup.\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 a BLT-1203A unit. The BMS accepted the cell without fault codes, completed the power-on self-test, and held steady voltage across the monitoring load without triggering low-battery interrupts.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After installing this battery, let the monitor complete its full power-on self-test without interruption. The BLT-1203A runs a BMS verification sequence at boot — cutting power during this window locks in a false battery fault that won't clear until the next complete reboot cycle.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLT-1203A alarming low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BLT-1203A's charge IC applies a conservative acceptance threshold calibrated to an aged OEM cell. A new cell has a slightly different internal resistance profile, and the monitor's BMS can read this as a failed self-test rather than a full charge. This triggers a low-battery alarm even when the cell is at or near 12.6V. Running one complete charge-to-discharge cycle — draining the monitor to auto-shutoff, then charging uninterrupted to 100% — recalibrates the BMS to the new cell's profile and clears the alarm.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBLT-1203A failing to power on after the replacement cell sat in storage\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the BAT-120002 replacement has been sitting unused, its resting voltage may have dropped below the BLT-1203A's BMS recovery threshold — typically around 10.0V for a 12V pack — and the monitor will not boot. The BMS interprets sub-threshold voltage as a damaged or absent cell and blocks startup. Connect the monitor to mains power and leave it charging for at least 30 minutes before attempting to power on; this allows the charger to push the cell above the BMS recovery floor so normal operation can resume.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381466890330,"sku":"BWCS-BLT120MD-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381466923098,"sku":"BWCS-BLT120MD-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381466955866,"sku":"BWCS-BLT120MD-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BLT120MD-1.webp?v=1778901051","url":"https:\/\/batteryweb.com\/products\/biolight-blt-1203a-replacement-battery-12v-1700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}