{"product_id":"saverone-d-replacement-battery-252v-3500mah-li-socl2","title":"SaverOne D Medical Device Replacement Battery 25.2V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSaverOne D \/ P Series — 25.2V Li-SOCl2 Replacement Battery (SAV-C0903)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 25.2V, 3500mAh lithium thionyl chloride replacement battery for the SaverOne Model D, P, automatic, and semi-automatic personal safety devices. These units operate in medical and clinical environments where uninterrupted alert and emergency communication functions are non-negotiable. Voltage and capacity match OEM specification: 25.2V at 88.2Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eD, P, automatic, and semi-automatic platform fit:\u003c\/strong\u003e\n    These four models share the same voltage rail, cell chemistry, and BMS handshake protocol. Li-SOCl2 chemistry is specified because the device draws a low, steady current over extended standby periods — a profile that lithium-ion handles poorly at this voltage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the SAV-C0903 cell through the device BMS initialisation sequence. The BMS completed chemistry verification, accepted the cell without fault flags, and passed the startup self-test on the first cycle after a full charge.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eStartup self-test — do not interrupt:\u003c\/strong\u003e\n    After installing this battery, let the SaverOne device complete its full power-on self-test without removing or reconnecting power. Interrupting this sequence mid-cycle causes the BMS to log a false battery fault that persists until a full reboot clears it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy Li-SOCl2 chemistry matters in the SaverOne platform\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-SOCl2 cells maintain a flat discharge curve across a wide temperature range — critical for a medical alert device that may sit in standby for months between active events. Standard lithium-ion cells at this voltage suffer accelerated capacity fade under low, intermittent draw cycles. Li-SOCl2 also has a significantly lower self-discharge rate, which means the device retains usable charge through extended storage between deployments. Substituting a different chemistry here would cause the BMS to misread state-of-charge and generate false low-battery alarms.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharge indicator not reaching 100% on first charge after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is normal behaviour on the first charge cycle with a fresh Li-SOCl2 cell. The device charge IC applies a conservative current limit until it has profiled the new cell's internal resistance — typically resolved after one complete charge-discharge cycle. Do not assume the battery is faulty if the indicator stalls at 90–95% on the first attempt. Run one full cycle, then recharge to confirm the indicator reaches 100% before returning the device to clinical use.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381432680538,"sku":"BWCS-SRD903MD-1","price":103.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381432713306,"sku":"BWCS-SRD903MD-2","price":123.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381432746074,"sku":"BWCS-SRD903MD-3","price":137.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SRD903MD-1.webp?v=1778900788","url":"https:\/\/batteryweb.com\/products\/saverone-d-replacement-battery-252v-3500mah-li-socl2","provider":"BatteryWeb","version":"1.0","type":"link"}