{"product_id":"nokia-51-plus-replacement-battery-385v-3000mah-li-polymer","title":"Nokia 5.1 Plus HE342 Replacement Battery 3.85V 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eNokia 5.1 Plus \/ 6.1 Plus \/ X5 \/ X6 2018 — 3.85V Li-Polymer Replacement Battery (HE342 \/ HE361)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.85V, 3000mAh (11.55Wh) Li-Polymer cell that replaces the original Nokia HE342 and HE361 batteries. It fits the Nokia 5.1 Plus, 6.1 Plus, X5 (TA-1109), and X6 2018. If your original battery no longer holds charge or the phone shuts down unexpectedly under load, this cell restores the power supply to factory spec.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNokia 5.1 Plus \/ 6.1 Plus \/ X5 \/ X6 2018 compatibility:\u003c\/strong\u003e\n    These four models share the same HE342 and HE361 cell format, voltage rail, and connector pinout. The BMS handshake protocol is identical across the group, so one SKU covers all four without any hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through full charge and discharge cycles on a Nokia 5.1 Plus. The BMS accepted the cell on first connection, protection circuits responded correctly at high-current screen-on and modem load spikes, and the charge IC cycled cleanly without faults.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFuel gauge recalibration after install:\u003c\/strong\u003e\n    On first use after fitting this cell, 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 high-current charging pushes current into an uncalibrated coulomb counter.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the Nokia 5.1 Plus reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe MediaTek fuel gauge IC stores a learned discharge curve from the original cell. After a replacement, that stored curve no longer matches the new cell's actual voltage profile. The IC reads voltage and maps it to a percentage using stale data, so the number on screen can be off by 10–20%. One full discharge from 100% down to auto-shutdown, followed by a full uninterrupted charge, forces the IC to rewrite its calibration data against the new cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSudden shutdown at 20–30% on the replacement cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis happens when the fuel gauge IC is still using the old cell's calibration and the reported percentage does not reflect true state of charge. As load spikes under modem activity or screen brightness, cell voltage drops sharply below the BMS cutoff threshold — around 3.0V — before the OS has time to issue a low-battery warning. The fix is the same single full discharge-charge cycle that recalibrates the coulomb counter. After calibration, shutdowns at falsely reported 20–30% stop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43392000360538,"sku":"BWCS-NKT510SL-1","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43392000393306,"sku":"BWCS-NKT510SL-2","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43392000426074,"sku":"BWCS-NKT510SL-3","price":30.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NKT510SL-1.webp?v=1779142856","url":"https:\/\/batteryweb.com\/products\/nokia-51-plus-replacement-battery-385v-3000mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}