Nokia G11 Plus 2022 Replacement Battery GH6581 3.85V 4850mAh

Nokia G11 Plus 2022 — 3.85V Li-Polymer Replacement Battery (GH6581)

This 3.85V, 4850mAh (18.67Wh) Li-Polymer battery replaces the original GH6581 cell in the Nokia G11 Plus 2022. It fits variant model numbers TA-1421, TA-1413, and TA-1408. It restores power to the processor, display, and cellular radio after the original cell degrades past usable capacity.

• G11 Plus 2022 variant coverage (TA-1421, TA-1413, TA-1408): Nokia released the G11 Plus across multiple regional SKUs with identical battery housings, connector pinouts, and BMS handshake requirements. The GH6581 cell fits all confirmed variants — no adapter or modification needed.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Nokia G11 Plus unit. The BMS accepted the charge handshake on the first cycle, voltage held steady under combined screen-on and LTE load, and cutoff triggered correctly at the low-voltage threshold.
• Fuel gauge recalibration on first cycle: On first use after installation, disable fast charging and run one full discharge-charge cycle at standard rate. The fuel gauge IC needs to map this cell's actual discharge curve before it can report accurate percentages — skipping this step causes erratic readings for the first several charges.

Sudden shutdown at 20–30% on the Nokia G11 Plus after a cell swap

The G11 Plus fuel gauge IC retains the discharge curve from the old, degraded cell. When a new cell with different internal resistance is installed, the IC's voltage-to-percentage mapping is wrong. Under modem or screen load, the phone pulls more current than the gauge predicts, voltage drops sharply below the shutdown threshold, and the device cuts out — even though the physical cell still has charge remaining. This resolves after one complete calibration cycle: discharge to auto-shutdown, then charge uninterrupted to 100% without fast charging enabled.

USB-PD fast charge not accepted on first cycle after replacement

Some replacement Li-Polymer cells ship with the BMS in a conservative protection state after storage. On the first charge cycle, the charge IC may not complete the USB-PD handshake, defaulting to standard 5V charging instead. This is not a fault — it clears after the first full charge cycle brings the cell above 3.9V per cell and the BMS exits its initial protection window. If fast charging still does not activate after two full cycles, check that the charger outputs at least 10W and the cable is rated for data and power.