Huawei H1512 Replacement Battery 3.8V 3450mAh HB416683ECW

Huawei Nexus 6P (Angler) — 3.8V Li-Polymer Replacement Battery (HB416683ECW)

This is a 3.8V, 3450mAh Li-Polymer cell for the Huawei Nexus 6P, also sold under model codes H1512 and H1511. It replaces the original HB416683ECW cell when the factory battery has degraded or failed to hold charge. Capacity is rated at 3450mAh (13.11Wh) — the same nominal spec as the original cell.

• Nexus 6P / Angler platform fit: The H1512, H1511, and Angler designations all refer to the same Nexus 6P hardware revision. They share an identical battery bay, connector, and BMS handshake — one cell covers all three.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a Nexus 6P unit. The BMS accepted the cell without error flags, and the charge IC progressed normally through CC and CV phases to termination.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings in the first week.

Sudden shutdown at 20–30% on the Nexus 6P after a cell swap

The Nexus 6P's Qualcomm SoC pulls hard on the battery rail when LTE, GPS, and the screen run simultaneously. A fresh cell with an uncalibrated fuel gauge can show 25% remaining while actual cell voltage has already dropped below the BMS cutoff threshold — typically around 3.4V under load. The BMS cuts power to protect the cell, and the phone shuts off despite the percentage indicator saying otherwise. One full discharge-charge cycle with fast charging off recalibrates the coulomb counter and eliminates most of these false-floor shutdowns.

OS reporting wrong battery percentage after replacing the HB416683ECW

Android's battery percentage reads from the fuel gauge IC, which stores a learned discharge curve from the original cell. After a swap, that stored curve no longer matches the new cell's actual voltage-to-capacity profile. The result is jumpy or inaccurate readings — commonly a sudden drop from 40% to 5%, or a percentage that barely moves for the first hour of use. Drain the phone fully until it shuts down, then charge uninterrupted to 100% without fast charging enabled. After that single cycle the fuel gauge recalibrates against the new cell and percentage accuracy normalises.