Explay Fresh Replacement Battery 3.8V 2000mAh Li-Polymer

Explay Fresh — 3.8V Li-Polymer 2000mAh Replacement Battery

This is a 3.8V, 2000mAh Li-Polymer replacement battery for the Explay Fresh smartphone. It fits directly into the Fresh's battery bay and connects to the same charge IC and fuel gauge circuit as the original cell. Use the capacity figure from this listing — 2000mAh — as the reference spec.

• Explay Fresh platform fit: The Fresh uses a single-cell Li-Polymer architecture with a nominal 3.8V rail. This cell matches that voltage rail and the physical footprint — 97.89 × 40.67 × 3.44mm — so the connector seats correctly without forcing.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS accepted charge from the Fresh's onboard charge IC without triggering overcurrent cutoff, and held stable voltage through screen-on and modem-active load states.
• Fuel gauge recalibration on first use: On the first charge after installation, disable fast charging if your charger supports it and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before making percentage estimates under load.

Why the Explay Fresh reports wrong battery percentage after a cell swap

The Fresh uses a coulomb counter IC that builds its charge estimate from the previous cell's discharge curve. When you install a new cell, that stored model no longer matches actual cell behaviour, so the percentage display drifts. The IC needs at least one full discharge from 100% down to automatic shutdown, followed by a full charge, to re-anchor its coulomb count to the new cell. Until that cycle completes, readings above 80% and below 30% are the least accurate. After the calibration cycle, percentage reporting stabilises across normal usage.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the protection threshold under high-current load — typically during active LTE data, screen at full brightness, or GPS — even though the fuel gauge still shows charge remaining. The BMS cuts the output when cell voltage sags below roughly 3.2V under load, which does not match the resting voltage the gauge used to calculate percentage. The fix is completing a full calibration cycle so the fuel gauge accounts for the cell's actual voltage sag profile. If shutdowns persist after two full cycles, check that the connector is fully seated — a partially connected cell increases internal resistance and worsens voltage sag.