{"product_id":"szosen-oip-900-replacement-battery-111v-3350mah-li-ion","title":"Szosen OIP-900 Replacement Battery 11.1V 3350mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSzosen OIP-900 — 11.1V Li-ion Replacement Battery (JHOTA-990-00)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 11.1V 3350mAh Li-ion battery is a direct replacement for the Szosen OIP-900 pulse oximeter. It fits the OIP-900 portable oxygen saturation monitor used in clinical and home healthcare settings. Voltage and capacity match the original specification: 11.1V, 3350mAh (37.19Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eOIP-900 platform fit:\u003c\/strong\u003e\n    The OIP-900 runs a three-cell series Li-ion pack at 11.1V nominal. This replacement matches that cell configuration, connector pinout, and BMS handshake protocol — the device power management system will recognise the pack and accept charge input without flagging a foreign battery fault.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the OIP-900 charge circuit and monitored BMS communication at each stage. The protection IC responded correctly to charge termination, over-discharge cutoff, and short-circuit detection across all test runs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the OIP-900 to complete its full power-on self-test without interruption. Medical device BMS verification runs at startup — cutting power mid-sequence registers 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\"\u003eOIP-900 alarming low battery immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe OIP-900 BMS compares cell voltage and internal resistance against stored OEM baseline values. A new replacement cell has slightly higher internal resistance before the first few charge-discharge cycles, which can push it below the device's alarm threshold even at full state of charge. This is not a fault with the battery — it is the BMS applying conservative thresholds calibrated to a conditioned cell. Run one complete charge-discharge cycle and the internal resistance will drop enough for the BMS to clear the alarm. After that cycle, the device should read charge state accurately.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eOIP-900 will not power on after the replacement battery sat in storage\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge during storage. If the pack voltage drops below approximately 9V — the OIP-900 BMS recovery threshold for a three-cell series pack — the protection circuit locks out power delivery to prevent damage from deep discharge. The device will appear completely dead: no boot, no display, no response to the power button. Connect the charger and leave it uninterrupted for at least 30 minutes to allow the charge IC to apply a low-current pre-charge and bring cell voltage back above the BMS unlock threshold of around 9.9V, after which normal charging resumes.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381418459226,"sku":"BWCS-SOP900MX-1","price":41.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381418491994,"sku":"BWCS-SOP900MX-2","price":48.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381418524762,"sku":"BWCS-SOP900MX-3","price":53.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SOP900MX-1.webp?v=1778900681","url":"https:\/\/batteryweb.com\/products\/szosen-oip-900-replacement-battery-111v-3350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}