{"product_id":"braun-thermoscan-pro-4000-replacement-battery-24v-700mah-ni-mh","title":"Braun ThermoScan Pro 4000 Replacement Battery 2.4V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBraun ThermoScan Pro 4000 — 2.4V Ni-MH Replacement Battery (53020-0000)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 700mAh Ni-MH battery pack for the Braun ThermoScan Pro 4000 infrared ear thermometer. It replaces OEM part 53020-0000 directly. The ThermoScan Pro 4000 is a clinical-grade ear thermometer used in medical settings for rapid, non-invasive temperature measurement.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eThermoScan Pro 4000 compatibility:\u003c\/strong\u003e\n    The Pro 4000 runs its BMS handshake at 2.4V nominal — the two-cell Ni-MH configuration matches the OEM voltage rail and connector footprint exactly. Any deviation from the 2.4V nominal causes the device to flag a battery fault on startup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through a full charge-discharge cycle on the Pro 4000 platform. The BMS accepted the cell without fault codes, completed the power-on self-test, and held voltage within the operating window across repeated measurement cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use protocol for clinical devices:\u003c\/strong\u003e\n    After installing this battery, let the Pro 4000 complete its full power-on self-test without powering it off mid-sequence. The BMS runs a chemistry verification pass at startup — interrupting it locks in 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 Pro 4000 flags a low-battery alarm on a freshly charged replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Pro 4000's BMS holds internal reference thresholds calibrated to a broken-in Ni-MH cell. A new cell's voltage curve is slightly flatter in the first few cycles, which the BMS reads as insufficient charge even when the cell is full. This is not a fault with the battery — it is a learn-cycle behaviour. Run one complete charge-to-discharge cycle before relying on the battery indicator. After that first cycle, the BMS recalibrates and the alarm clears.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePro 4000 will not power on after the replacement cell sat in storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge during storage. If voltage drops below approximately 2.0V, the Pro 4000's BMS will not initiate the boot sequence — the device simply shows nothing when powered on. Place the battery on charge immediately after installation, even if the pack was recently shipped. A minimum charge of 15–20 minutes brings the cell above the BMS recovery threshold of around 2.2V, at which point the device will boot normally.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381478457434,"sku":"BWCS-BRP400MD-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381478490202,"sku":"BWCS-BRP400MD-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381478522970,"sku":"BWCS-BRP400MD-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BRP400MD-1.webp?v=1778901170","url":"https:\/\/batteryweb.com\/products\/braun-thermoscan-pro-4000-replacement-battery-24v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}