{"product_id":"edan-m9-replacement-battery-144v-2600mah-li-ion","title":"Edan HYLB-957A M9 Patient Monitor 14.4V Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEdan M9 \/ M8A Series — 14.4V Li-ion Replacement Battery (HYLB-957A)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V, 2600mAh Li-ion battery replaces the HYLB-957A and HYLB-957 cells used in the Edan M9, M9B, and M8A portable patient monitors. These monitors are used for vital signs assessment and patient transport in clinical environments. Voltage and capacity match OEM spec exactly — no firmware flags from the monitor's BMS.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM9, M9B, and M8A compatibility:\u003c\/strong\u003e\n    All three models share the same 14.4V battery rail, connector pinout, and BMS handshake protocol. A single HYLB-957A cell works across all three without modification or adapter.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge on the M9 platform. The monitor's BMS accepted the cell without throwing a battery fault, and the charge IC brought it to full capacity within the standard charge window.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After installation, let the M9 complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power during this window 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\"\u003eWhy the M9 flags a battery error immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M9's BMS stores charge cycle data and compares new readings against a learned profile from the previous cell. A fresh replacement has no cycle history, so the BMS may interpret the unrecognised chemistry fingerprint as a fault. This is not a defective cell — it is the monitor applying a conservative threshold until the battery completes one full charge-discharge cycle. Run one complete cycle before clinical deployment. After that cycle, the monitor's charge IC recalibrates and the error clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eM9 will not power on after battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the cell voltage drops below approximately 10V, the M9's BMS enters a protection state and blocks the startup sequence entirely — the power button produces no response. Connect the monitor to mains power and leave it on charge for at least 30 minutes before pressing power. This allows the charge IC to trickle current into the cell until it crosses the BMS recovery threshold, typically around 12V, at which point normal startup resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381507588186,"sku":"BWCS-EDM900MD-1","price":55.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381507620954,"sku":"BWCS-EDM900MD-2","price":65.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381507653722,"sku":"BWCS-EDM900MD-3","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EDM900MD-1.webp?v=1778901305","url":"https:\/\/batteryweb.com\/products\/edan-m9-replacement-battery-144v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}