MetroPCS Anthem 4G Compatible Battery 3.8V 1950mAh

MetroPCS Anthem 4G / Bound / N910 — 3.8V Li-ion Replacement Battery

This 3.8V, 1950mAh (7.41Wh) lithium-ion cell replaces the original battery in the MetroPCS Anthem 4G, Bound, and ZTE N910. The original cell degrades over charge cycles, causing erratic shutdowns and false percentage readings. This replacement restores normal device operation at factory voltage.

• Anthem 4G, Bound, and N910 compatibility: All three models share the same battery bay dimensions (56.00 × 55.50 × 5.00mm), connector pinout, and 3.8V nominal voltage rail. The BMS in each device communicates on the same charge IC protocol, so this cell seats and handshakes correctly across all three.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on the N910 platform. The BMS accepted the cell without error codes, charge termination triggered correctly at full voltage, and the protection circuit responded to load spikes from the modem without tripping into lockout.
• Fuel gauge recalibration after install: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Why the Anthem 4G reports wrong battery percentage after a cell swap

The fuel gauge IC stores a learned discharge curve from the original cell. When you swap in a new cell, the IC still references those old parameters. This causes the reported percentage to lag, jump, or bottom out early — even though the physical cell has charge remaining. One complete discharge cycle from 100% down to automatic shutoff, followed by a full uninterrupted charge, forces the IC to rewrite its reference curve against the new cell's actual behaviour.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff, not a capacity problem. Under the combined load of the modem radio and screen, cell voltage can sag below the BMS cutoff threshold — typically around 3.2V — even while the fuel gauge still reads 20–30%. The phone shuts down to protect the cell before the IC registers the drop. Let the device cool for two minutes, then power back on — if it boots and immediately shows a low percentage, the fuel gauge IC has not yet recalibrated. Run one full discharge-charge cycle to correct the reference baseline.