{"product_id":"huntleigh-doppler-dopplex-ability-replacement-battery-12v-2100mah-ni-mh","title":"Huntleigh Doppler Dopplex Ability 12V Replacement Battery 771332","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHuntleigh Doppler Dopplex Ability — 12V Ni-MH Replacement Battery (771332)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 2100mAh Ni-MH replacement battery for the Huntleigh Dopplex Ability portable vascular Doppler. It fits the handheld Dopplex Ability used in clinical settings for non-invasive blood flow assessments. OEM part numbers 771332 and 771332-4 are both covered by this cell.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDopplex Ability platform fit:\u003c\/strong\u003e\n    The Dopplex Ability runs a 12V Ni-MH chemistry with a specific connector and BMS handshake. This cell matches the voltage rail and pack geometry the device expects — 84.20 x 45.90 x 34.00mm — so the battery seats and communicates correctly.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this battery through a full charge and discharge sequence on the Dopplex Ability platform. The BMS completed its verification pass without triggering a fault, and the charge IC accepted the cell without forcing a low-battery alarm.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, let the Dopplex Ability complete its full power-on self-test cycle without interruption. The device runs a BMS verification check at startup — cutting power during this sequence causes a false battery fault that persists until the next full 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 Dopplex Ability alarms low battery on a freshly charged cell\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Dopplex Ability's BMS stores a charge profile from the previous cell. A new Ni-MH cell has a slightly different internal resistance signature, and the BMS compares startup voltage against that stored threshold. On the first cycle, the new cell may read below the BMS pass threshold even at full charge. Run one complete charge-discharge cycle before using the device clinically — after that cycle, the BMS updates its reference and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDopplex Ability not powering on after the battery sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge at roughly 1–2% per day in storage. If the pack voltage drops below the Dopplex Ability's BMS recovery threshold — typically around 10.5V for a 12V Ni-MH pack — the device refuses to boot. Place the battery on charge for a full uninterrupted cycle before inserting it into the device. If the charger detects the cell and begins charging, the pack voltage is recoverable. If the charger shows no activity, check pack voltage with a multimeter — below 9V, the cell may be too deeply discharged to recover.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381362851930,"sku":"BWCS-HDA332MD-1","price":70.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381362884698,"sku":"BWCS-HDA332MD-2","price":83.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381362917466,"sku":"BWCS-HDA332MD-3","price":93.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HDA332MD-1.webp?v=1778900267","url":"https:\/\/batteryweb.com\/products\/huntleigh-doppler-dopplex-ability-replacement-battery-12v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}