{"product_id":"nokia-71-replacement-battery-38v-3000mah-li-polymer","title":"HE340 Nokia 7.1 Replacement Battery 3.8V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia 7.1 \/ TA-1041 — 3.8V Li-Polymer Replacement Battery (HE340 \/ HE347)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.8V, 3000mAh lithium-polymer cell is a direct replacement for the Nokia 7.1 smartphone. It fits the TA-1041 hardware variant and replaces OEM part numbers HE340 and HE347. Total energy capacity is 11.4Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNokia 7.1 and TA-1041 compatibility:\u003c\/strong\u003e\n    Both the Nokia 7.1 and its TA-1041 regional variant share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one cell covers both boards without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Nokia 7.1 unit and confirmed the BMS accepted charge from the PMIC without triggering a fault state. Charge termination fired correctly at 4.35V and protection cutoff held at the expected low-voltage threshold.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after swap:\u003c\/strong\u003e\n    On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before the coulomb counter locks in its reference points — skipping this step causes the OS to report inaccurate percentages for several days.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the Nokia 7.1 after a cell replacement\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nokia 7.1 uses a coulomb-counter-based fuel gauge IC that was calibrated to the discharge curve of the original aged cell. A new cell has a flatter voltage curve and higher capacity, so the IC's internal model no longer matches actual cell behaviour. Under modem transmit bursts or screen-on GPU load, voltage drops briefly below the shutdown threshold even though the cell is not truly empty. Running one full discharge cycle — draining to automatic shutdown, then charging uninterrupted to 100% — forces the IC to relearn the curve and eliminates false cutoffs.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB fast charge not activating on the first cycle after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter a cell swap, the Nokia 7.1's charge IC sometimes stays in trickle-charge mode on the first plug-in, especially if the new cell arrived with a low state of charge from storage. The IC treats any cell below roughly 3.0V as a suspect or damaged cell and throttles current as a safety measure. Let the phone charge uninterrupted for at least 20 minutes on a standard 5V charger first — once the cell clears the pre-charge threshold, the IC re-evaluates and standard charge rates resume automatically.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392000163930,"sku":"BWCS-NKT720SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392000196698,"sku":"BWCS-NKT720SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392000229466,"sku":"BWCS-NKT720SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NKT720SL-1.webp?v=1779142856","url":"https:\/\/batteryweb.com\/products\/nokia-71-replacement-battery-38v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}