MetroPCS HWM570 Replacement Battery 3.7V 1100mAh Li-ion

MetroPCS HWM570 / Verge — 3.7V Li-ion Replacement Battery

This 3.7V Li-ion cell replaces the original battery in the MetroPCS HWM570 and Verge handsets. Capacity is 1100mAh (4.07Wh), matching the stock cell specification. The physical dimensions are 54.05 × 34.10 × 5.40mm — confirm these against your existing cell before installing.

• HWM570 and Verge compatibility: Both handsets share the same battery bay dimensions, connector pinout, and charge IC requirements, which is why one cell covers both models. The BMS on each device uses the same voltage thresholds — 4.2V charge ceiling, 3.0V cutoff — so no firmware or hardware changes are needed.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the HWM570 platform. The BMS accepted the cell without rejection flags, held charge termination at 4.2V, and triggered low-voltage cutoff cleanly at 3.0V under load.
• Fuel gauge recalibration on first use: After installing this cell, run one full discharge to auto-off, then charge to 100% without interruption. The HWM570's fuel gauge IC is still calibrated to the old cell's discharge curve — skipping this step causes the percentage counter to jump or report incorrectly for several days.

Why the HWM570 reports wrong battery percentage after a cell swap

The HWM570 uses a coulomb-counter-based fuel gauge IC that builds its percentage model from the discharge history of the original cell. When you swap in a new cell, that learned curve no longer matches the new cell's actual voltage-to-capacity relationship. The gauge will show inflated or deflated readings until it recalibrates. One full discharge-charge cycle resets the reference points and brings the percentage display back into alignment.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under the load of the modem radio or screen backlight — a voltage cliff the fuel gauge did not predict. The gauge reads 25% capacity remaining, but the actual cell voltage has already fallen below the 3.0V cutoff threshold under load. It is more common on the first few cycles with a new cell before the gauge recalibrates. Run the full discharge-to-charge conditioning cycle and the shutdowns should stop appearing above 15%.