{"product_id":"welch-allyn-spot-vital-signs-monitor-replacement-battery-36v-1800mah-ni-cd","title":"Welch-Allyn 72250 Spot Vital Signs Monitor Replacement Battery 3.6V 1800mAh Ni-CD","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWelch-Allyn Spot Vital Signs Monitor — 3.6V Ni-Cd Replacement Battery (72250)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.6V 1800mAh Ni-Cd battery replaces the original power cell in the Welch-Allyn Spot Vital Signs Monitor, Lumi View, and Ophthalmoscope. It matches the OEM form factor and connector, so no modification is needed for installation. Capacity is 6.48Wh — use the product data figure, not third-party sources.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSpot Monitor, Lumi View, and Ophthalmoscope compatibility:\u003c\/strong\u003e\n    These three devices share the same 3.6V Ni-Cd cell format, connector pinout, and BMS handshake protocol — that's why one part number covers all three platforms.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge and discharge cycles on the Spot Monitor platform. The BMS accepted the cell on first insertion, completed its self-test sequence without fault codes, and logged correct state-of-charge data from cycle one.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-swap startup protocol:\u003c\/strong\u003e\n    After installing this battery, let the device complete its full power-on self-test without pressing any buttons or interrupting the boot sequence. The Spot Monitor runs a BMS verification routine at startup — cutting power during this window writes 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\"\u003eWhy the Spot Monitor shows a low-battery alarm immediately after a confirmed full charge\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Spot Monitor's BMS holds a chemistry-calibrated threshold table loaded for the OEM cell's aged charge profile. A brand-new Ni-Cd cell presents a slightly different internal resistance signature on first insertion, which the BMS interprets as below the minimum acceptable state-of-charge. This is not a fault with the cell. Run one complete charge-discharge cycle and the BMS recalibrates its threshold to the new cell's actual profile — the alarm clears after that first full cycle.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDevice will not power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-Cd cells self-discharge during storage. If voltage has dropped below the Spot Monitor's BMS recovery threshold — typically around 3.0V for a 3.6V pack — the device will not boot, and the charge indicator may show no activity. Place the battery on charge for a minimum of 30 minutes before attempting power-on. If the charge IC still shows no activity after 30 minutes, disconnect, wait 60 seconds, and reconnect to trigger the recovery charge mode.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381472362586,"sku":"BWCS-WB250MD-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381472395354,"sku":"BWCS-WB250MD-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381472428122,"sku":"BWCS-WB250MD-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WB250MD-1.webp?v=1778901067","url":"https:\/\/batteryweb.com\/products\/welch-allyn-spot-vital-signs-monitor-replacement-battery-36v-1800mah-ni-cd","provider":"BatteryWeb","version":"1.0","type":"link"}