{"product_id":"siemens-servo-i-replacement-battery-36v-2700mah-li-socl2","title":"Siemens Servo i 3.6V Replacement Battery 06194687","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSiemens Servo i \/ Servo S — 3.6V Li-SOCl2 Replacement Battery (06194687)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V lithium thionyl chloride (Li-SOCl2) replacement battery for the Siemens Servo i and Servo S critical care mechanical ventilators. Rated at 2700mAh (9.72Wh), it powers the backup memory and alarm systems that keep the ventilator operational during brief power interruptions. OEM part number 06194687 applies across the Adult and Infant variants of this platform.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eServo i \/ Servo S platform fit:\u003c\/strong\u003e\n    Both the Adult and Infant Servo variants share the same 3.6V backup battery rail and connector format. The BMS on each unit reads cell chemistry — Li-SOCl2 is specifically required here because the device's charge IC is calibrated for thionyl chloride discharge curves, not lithium-ion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We verified OCV on arrival, confirmed the cell holds above 3.5V under low-draw load, and checked that the Servo's self-test sequence accepts the cell without triggering a battery fault flag.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this cell, allow the Servo i to complete its full power-on self-test cycle without interrupting power. The BMS runs a verification check at startup — cutting power mid-sequence creates a latched battery fault that won't clear 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 Servo i logs a battery fault after a confirmed good cell is installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-SOCl2 cells have a passivation layer that forms on the anode during storage. This layer temporarily raises internal resistance, which the Servo's BMS reads as a degraded or incompatible cell. The fault is not a wiring or compatibility issue — it is the cell itself reporting high impedance before the passivation layer clears. A short low-current discharge, triggered by one full self-test cycle, is enough to break down the layer and bring impedance back within the BMS acceptance window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eServo i showing low battery alarm immediately after cell replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA fresh Li-SOCl2 cell that has been in storage for six months or more will often trigger the Servo's low battery alarm on first boot, even at full charge. The device's alarm threshold is calibrated against OEM cell voltage under load — a passivated cell can dip below 3.3V during the startup self-test draw, crossing that threshold. Run one complete power-on self-test without interruption and monitor the alarm status on the second boot. If the alarm clears on the second cycle, the cell is functioning correctly; if it persists, check the cell's open-circuit voltage with a multimeter — it should read at or above 3.5V at rest.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381419442266,"sku":"BWCS-MSA300BU-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381419475034,"sku":"BWCS-MSA300BU-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381419507802,"sku":"BWCS-MSA300BU-3","price":29.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MSA300BU-1.webp?v=1778900680","url":"https:\/\/batteryweb.com\/products\/siemens-servo-i-replacement-battery-36v-2700mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}