{"product_id":"ohmeda-see-datek-replacement-battery-48v-3600mah-ni-mh","title":"Ohmeda 5120 Oxygen Monitor Replacement Battery 4.8V 3600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOhmeda See Datek \/ 5120 \/ 5420 Series — 4.8V Ni-MH Replacement Battery (0690-1000-311)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V 3600mAh Ni-MH replacement battery for Ohmeda\/Datex medical monitoring equipment. It fits the See Datek, 5120 Oxygen Monitor, and 5420 Volume Monitor. The OEM part number is 0690-1000-311.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSee Datek, 5120, and 5420 compatibility:\u003c\/strong\u003e\n    These three units share the same 4.8V bus, the same connector footprint, and the same BMS handshake protocol — that is why one cell pack covers all three. Swapping between them does not require a firmware change or recalibration step.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell pack through full charge and discharge on a clinical bench rig. The BMS accepted the new cell without fault codes after one complete cycle. Voltage held steady at 4.8V across the discharge curve with no mid-cycle cutoff events.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePower-on self-test behaviour:\u003c\/strong\u003e\n    After fitting this battery, let the device complete its full startup sequence without removing power. These monitors run a BMS verification pass at boot. Cutting power during that window registers a false battery fault that stays latched 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 5120 or 5420 alarms low battery immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eOhmeda monitoring equipment uses a charge-acceptance threshold calibrated to aged OEM cells. A fresh Ni-MH cell has a slightly different internal resistance profile, and the BMS interprets that as incomplete charge on the first cycle. Run one full charge-to-discharge cycle before clinical deployment. After that conditioning cycle, the BMS recognises the cell's actual capacity and clears the alarm on subsequent charges.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge during storage. If the cell voltage drops below the BMS recovery threshold — typically around 4.0V for a 4.8V pack — the device will not boot because the BMS blocks startup to protect the load circuit. Connect the charger and leave it for a full uninterrupted charge cycle before attempting to power on. Once the pack reaches 4.8V, the BMS releases the lockout and the device boots normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381510471770,"sku":"BWCS-GVM540MD-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381510504538,"sku":"BWCS-GVM540MD-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381510537306,"sku":"BWCS-GVM540MD-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GVM540MD-1.webp?v=1778901306","url":"https:\/\/batteryweb.com\/products\/ohmeda-see-datek-replacement-battery-48v-3600mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}