{"product_id":"nokia-7-plus-replacement-battery-385v-3700mah-li-polymer","title":"HE346 Nokia 7 Plus Replacement Battery 3.85V 3700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia 7 Plus \/ TA-1046 — 3.85V Li-Polymer Replacement Battery (HE346)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3700mAh (14.25Wh) Li-Polymer cell rated at 3.85V, built to the HE346 specification for the Nokia 7 Plus (TA-1046). It replaces the original cell when capacity has dropped, the phone shuts down unexpectedly, or the battery no longer holds a useful charge. Dimensions are 88.10 × 65.55 × 4.10mm — verify clearance before installation.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNokia 7 Plus and TA-1046 compatibility:\u003c\/strong\u003e\n    Both model designations share the same battery bay geometry, connector pinout, and BMS handshake protocol. The HE346 part number covers both — no hardware difference between variants at the cell level.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through charge, standby, and load conditions on a Nokia 7 Plus unit. The BMS handshake completed correctly, charge current stepped down as expected near full capacity, and no thermal events occurred during the test sequence.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration on first use:\u003c\/strong\u003e\n    After fitting this cell, disable fast charging and run one full discharge-to-charge cycle at standard rate. The fuel gauge IC on the Nokia 7 Plus is calibrated to the old cell's discharge curve. One slow cycle lets it map the new cell before fast charge pushes high current into an uncalibrated state.\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 Plus after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nokia 7 Plus uses a coulomb counter that tracks charge in and out of the cell. When a new cell goes in, the counter has no reference for where the voltage cliff on that specific cell sits. Under a sudden high-draw event — mobile data switching bands, display at full brightness, GPS active — the cell voltage can drop sharply below the BMS cutoff threshold even though the reported percentage looks safe. The phone cuts out to protect the circuit. Run two full discharge-charge cycles without fast charging to let the fuel gauge IC build an accurate state-of-charge map for the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eUSB-PD fast charge not accepted on first cycle after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a replacement cell, some Nokia 7 Plus units fall back to standard 5V charging and refuse to negotiate the fast charge protocol. This happens because the charge IC checks cell impedance before authorising higher current — a new cell at full impedance can cause the IC to conservatively deny the USB-PD handshake. Plug into a standard 5V charger, complete one full cycle, then retry your fast charger. Most units accept the protocol normally from the second cycle onward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391867093082,"sku":"BWCS-NKT346SL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391867125850,"sku":"BWCS-NKT346SL-2","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391867158618,"sku":"BWCS-NKT346SL-3","price":33.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NKT346SL-1.webp?v=1779142430","url":"https:\/\/batteryweb.com\/products\/nokia-7-plus-replacement-battery-385v-3700mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}