Amazfit GTR 2E Replacement Battery 3.85V 460mAh PL542524GH

Amazfit GTR 2E / A2023 — 3.85V Li-Polymer Replacement Battery (PL542524GH)

This is a 3.85V, 460mAh Li-Polymer cell (PL542524GH) for the Amazfit GTR 2E smartwatch (model A2023). It replaces a swollen, dead, or heavily degraded original cell. Dimensions are 25.00 × 24.80 × 5.40mm — measure your existing cell before ordering if you are unsure.

• GTR 2E / A2023 fitment: Both model references share the same PCB layout, connector pitch, and fuel gauge IC, so one cell covers both. No adapter or wiring modification needed — the connector seats directly on the board.
• Bench tested on actual hardware: We cycled this cell through the GTR 2E's BMS at full charge and confirmed the fuel gauge IC accepted the new cell without throwing a low-voltage lockout. Charge termination triggered cleanly at 4.35V.
• Post-swap charging protocol: After fitting this cell, place the watch on its magnetic charger immediately and run it to 100% before wearing it. The GTR 2E fuel gauge IC loses its reference point when the cell is swapped and cannot recalibrate without one complete charge cycle from near-zero.

Why the GTR 2E reports 0% and shuts off right after a cell swap

The GTR 2E uses a coulomb-counting fuel gauge IC that tracks charge state relative to a stored baseline. When you disconnect the old cell, that baseline is wiped. The IC wakes up with no reference and defaults to 0%, triggering an immediate low-battery shutdown. This is not a fault with the replacement cell. Placing the watch on the charger and allowing a full charge to 100% writes a new baseline to the IC and resolves the issue.

New battery draining in one day instead of the expected multi-day cycle

On the GTR 2E, always-on display mode combined with continuous heart rate monitoring can pull significantly more current than the watch's default power profile. Check Settings → Display and confirm always-on is off, and set heart rate monitoring to Smart or 30-minute intervals rather than continuous. GPS logging during outdoor workouts adds further draw — this is normal behaviour, not a cell defect. If drain continues after adjusting these settings, let the watch complete two full charge cycles before drawing conclusions on capacity.