{"product_id":"grason-stadler-300-vital-signs-monitor-replacement-battery-6v-5000mah-sealed-lead-acid","title":"Grason Stadler 300 Vital Signs Monitor 6V Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGrason Stadler 300 \/ 420 \/ 53NTO \/ 53OTO Vital Signs Monitor — 6V Sealed Lead Acid Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 6V 5000mAh (30Wh) sealed lead-acid battery for the Grason Stadler 300, 420, 53NTO, and 53OTO Vital Signs Monitors. These monitors are clinical-grade devices used to measure blood pressure, pulse, temperature, and SpO₂ at the bedside. This battery keeps the monitor running during patient examinations when AC power is unavailable.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e300, 420, 53NTO, and 53OTO platform compatibility:\u003c\/strong\u003e\n    All four models share the same 6V sealed lead-acid power bay and BMS voltage threshold. The connector pinout and physical dimensions are consistent across the series, so one cell fits the whole family without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through the monitor's power-on self-test sequence. The BMS accepted the battery, completed initialization without fault codes, and the charge circuit held a stable float voltage at the top of the charge curve.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test cycle:\u003c\/strong\u003e\n    After fitting this battery, let the monitor complete its full power-on self-test without interrupting it. The BMS runs a chemistry verification at startup — cutting power mid-sequence locks in a false battery fault flag 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 Grason Stadler monitor shows a battery fault after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe monitor's BMS stores a learned capacity profile from the original cell. When a new cell goes in, the profile doesn't match the incoming voltage curve on the first charge cycle, so the device flags a fault. This isn't a defective battery — it's the BMS comparing new cell behaviour against old cell data. One complete charge-discharge cycle resets the learned profile. After that cycle, the fault clears and the battery reads correctly on the monitor's display.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMonitor will not power on after the replacement battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSealed lead-acid cells self-discharge at roughly 3–5% per month. A cell stored for several months can drop below the BMS recovery threshold — typically around 5.0V for a 6V SLA — and the monitor refuses to boot. The fix is a slow recovery charge using a compatible SLA charger before installing the battery in the device. Once the cell reaches at least 6.0V open-circuit, the monitor's BMS will accept it and the boot sequence will complete normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381510668378,"sku":"BWCS-WB530MD-1","price":77.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381510701146,"sku":"BWCS-WB530MD-2","price":89.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381510733914,"sku":"BWCS-WB530MD-3","price":99.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WB530MD-1.webp?v=1778901341","url":"https:\/\/batteryweb.com\/products\/grason-stadler-300-vital-signs-monitor-replacement-battery-6v-5000mah-sealed-lead-acid","provider":"BatteryWeb","version":"1.0","type":"link"}