{"product_id":"oneplus-nord-replacement-battery-387v-3950mah-li-polymer","title":"OnePlus Nord BLP785 Replacement Battery 3.87V 3950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eOnePlus Nord \/ AC2003 — 3.87V Li-Polymer Replacement Battery (BLP785)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3950mAh (15.29Wh) Li-Polymer cell for the OnePlus Nord (AC2003). It replaces OEM part BLP785 when the original cell has degraded, swells, or no longer holds a charge. Voltage is 3.87V nominal — matched to the Nord's power management IC.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNord \/ AC2003 fit:\u003c\/strong\u003e\n    Both model variants share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The BLP785 footprint is 83.38 × 62.40 × 4.30mm — physical fit and the NTC thermistor line are confirmed compatible across both SKUs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell on a Nord unit and monitored BMS communication across charge and discharge. The protection circuit responded correctly to trickle charge entry, full-charge cutoff, and load-spike conditions without tripping into fault state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle calibration tip:\u003c\/strong\u003e\n    After fitting this cell, disable Warp Charge for the first full discharge-charge cycle. This lets the fuel gauge IC build an accurate coulomb counter baseline against the new cell's discharge curve before high-current charging pushes 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\"\u003eWhy the Nord reports wrong battery percentage after a cell swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Nord uses a coulomb counter that tracks charge in and out of the original cell over its lifetime. When you fit a new cell, that counter still holds calibration data mapped to the old cell's degraded capacity curve. The mismatch means the fuel gauge IC reports percentages that don't reflect what's actually in the new cell. One complete slow charge-discharge cycle resets the learned curve and brings the percentage readout back in line.\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 hasn't recalibrated yet and the displayed percentage is ahead of the cell's real state of charge. Under modem or display load, voltage drops sharply near the actual depletion point — the BMS cuts power before the OS can warn you. It's not a faulty cell. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% to anchor the fuel gauge to the new cell's voltage-capacity curve.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43391876890714,"sku":"BWCS-OPN200SL-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43391876923482,"sku":"BWCS-OPN200SL-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43391876956250,"sku":"BWCS-OPN200SL-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-OPN200SL-1.webp?v=1779142480","url":"https:\/\/batteryweb.com\/products\/oneplus-nord-replacement-battery-387v-3950mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}