HE316 Nokia 6 Replacement Battery 3.85V 3000mAh Li-Polymer

Nokia 6 / 6 Dual SIM — 3.85V Li-Polymer Replacement Battery (HE316 / HE335)

This 3.85V, 3000mAh (11.55Wh) lithium-polymer cell replaces the original HE316 and HE335 batteries in the Nokia 6 and Nokia 6 Dual SIM smartphones. It covers hardware variants TA-1025 and TA-1039, along with six additional regional model numbers sharing the same battery bay and connector. Dimensions are 78.50 × 63.95 × 3.50mm — fitting the original bay without modification.

• TA-1025 and TA-1039 compatibility: These variants run the same 3.85V power rail, use an identical flex connector pinout, and share the same BMS handshake protocol — so one cell covers the full Nokia 6 hardware family without any wiring changes.
• Bench tested on actual hardware: We cycled this cell through full discharge and charge on a Nokia 6 TA-1025 unit. The BMS accepted the cell on first connection, charge IC negotiation completed normally, and the fuel gauge IC tracked state-of-charge across the full cycle without error flags.
• First-cycle fuel gauge calibration: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before high-current fast charging is applied to an uncalibrated cell.

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

This is a voltage cliff, not a calibration error. Li-polymer cells have a steep voltage drop below a certain state-of-charge threshold — when the modem transmits or the display peaks in brightness, current draw spikes and the cell voltage collapses faster than the fuel gauge predicts. The BMS interprets that collapse as undervoltage and cuts the circuit instantly. Running two full discharge-charge cycles at standard current lets the coulomb counter build an accurate capacity model for the new cell, which pushes the cliff point down to a realistic percentage.

Nokia 6 reporting erratic or frozen battery percentage after replacement

The Nokia 6 fuel gauge IC stores a learned discharge curve from the old cell in its non-volatile memory. When a new cell goes in, the IC is still reading against the old model — so reported percentage drifts, sticks, or jumps. This is not a faulty battery. Drain the phone fully until it shuts itself down, then charge uninterrupted to 100% without removing the cable early. After one complete cycle the IC recalibrates against the new cell and percentage reporting stabilises.