{"product_id":"alaris-micro-1-spirometer-replacement-battery-24v-2000mah-ni-mh","title":"Alaris Micro 1 Spirometer 2.4V Replacement Battery 36-BAT1043","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAlaris Micro 1 Spirometer — 2.4V Ni-MH Replacement Battery (36-BAT1043)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 2000mAh Ni-MH replacement battery for the Alaris Micro 1 Spirometer. It fits the handheld portable unit used for pulmonary function testing in clinical settings. Cross-references OEM part numbers 36-BAT1043 and OM11861.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMicro 1 Spirometer platform fit:\u003c\/strong\u003e\n    The Micro 1 runs a 2.4V two-cell Ni-MH pack with a specific connector and BMS handshake. This replacement matches that voltage rail and physical form factor — 49.50 × 28.40 × 14.50mm — so it seats correctly 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 Micro 1's charge cycle and monitored BMS communication at startup. The battery passed the device's power-on self-test and charge termination handshake without triggering a false fault on the first full cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use self-test protocol:\u003c\/strong\u003e\n    After installing this battery, allow the Micro 1 to complete its full power-on self-test without interrupting it. Medical-grade BMS verification runs at startup — cutting power mid-sequence locks in a battery fault flag 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 Micro 1 Spirometer alarms low battery with a freshly charged replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Micro 1's BMS checks cell voltage against a calibration threshold set for a conditioned OEM cell. A new Ni-MH cell fresh from storage holds a resting voltage that can read lower than this threshold, even after a full charge. The BMS interprets this as a depleted pack and triggers a low-battery alarm before any testing begins. One complete charge-discharge cycle is usually enough for the cell voltage to stabilise and pass the BMS threshold check.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMicro 1 not powering on after the replacement battery sat unused\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge in storage — a cell left long enough can drop below the BMS recovery floor, which on the Micro 1 sits around 2.0V. Below that level, the device will not initiate a boot sequence at all, so pressing the power button produces no response. Place the battery on a Ni-MH charger externally, or leave it on the device charger for a full uninterrupted charge cycle. Once the pack recovers above 2.2V, the BMS re-engages and the device boots normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381367406682,"sku":"BWCS-BMR100MD-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381367439450,"sku":"BWCS-BMR100MD-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381367472218,"sku":"BWCS-BMR100MD-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BMR100MD_1.webp?v=1778900266","url":"https:\/\/batteryweb.com\/products\/alaris-micro-1-spirometer-replacement-battery-24v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}