{"product_id":"philips-m2475b-replacement-battery-12v-4000mah-ni-mh","title":"Philips M2475B Patient Monitor Replacement Battery 12V 4000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003ePhilips M2475B \/ Monitor 100 — 12V Ni-MH Replacement Battery (B11009)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 4000mAh (48Wh) Ni-MH replacement battery for the Philips M2475B vital signs monitor and Monitor 100. It slots into the battery bay and restores portable operation for patient transport and areas without fixed mains power. OEM part number B11009 confirmed against both fit models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eM2475B and Monitor 100 compatibility:\u003c\/strong\u003e\n    Both units share the same 12V battery bay format, connector pinout, and BMS handshake protocol. A single cell spec covers both platforms — no adapter or wiring modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the M2475B's power-on self-test sequence and monitored BMS communication at startup. The charge IC accepted the cell without a fault flag after one full conditioning cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the monitor to complete its full power-on self-test without interruption. The M2475B runs a BMS verification routine at boot — cutting power mid-sequence triggers a battery fault code that persists until the next clean reboot. Do not attach a charger during the initial self-test pass.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm firing immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe M2475B's BMS compares cell impedance against a threshold calibrated to a fully conditioned OEM cell. A new Ni-MH cell arrives with higher internal impedance than a broken-in one, so the monitor reads it as partially discharged even when voltage is correct. Run one complete charge-to-discharge-to-charge cycle through the device before drawing conclusions about capacity. After that first cycle, impedance drops and the alarm threshold is typically satisfied.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMonitor won't power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day. A cell stored for several months can drop below the M2475B's BMS recovery threshold — typically around 10V on a 12V pack — at which point the monitor refuses to boot. Connect the unit to mains and leave it on charge for a full 14–16 hours before attempting to power on. If the charge indicator stays dark for the first 30–40 minutes, that is normal low-voltage trickle recovery, not a fault. Once cell voltage climbs above 10.8V, the BMS unlocks normal charging current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381494087770,"sku":"BWCS-GME106MD-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381494120538,"sku":"BWCS-GME106MD-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381494153306,"sku":"BWCS-GME106MD-3","price":128.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GME106MD-1.webp?v=1778901266","url":"https:\/\/batteryweb.com\/products\/philips-m2475b-replacement-battery-12v-4000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}