MetroPCS MS910 Replacement Battery 3.7V 1500mAh Li-ion

MetroPCS MS910 Esteem — 3.7V Li-ion Replacement Battery

This 3.7V, 1500mAh lithium-ion cell replaces the original battery in the MetroPCS MS910 and LG Esteem smartphones. Both devices share the same battery bay dimensions (65.96 × 44.05 × 5.10mm) and voltage rail, so one cell covers both. Capacity is rated at 5.55Wh.

• MS910 and Esteem compatibility: Both phones run the same 3.7V supply rail and use an identical physical connector and bay. The BMS handshake requirements match, so the same replacement cell works across both without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the MS910 platform. The BMS accepted the cell without fault flags, and the charge IC completed a full cycle without tripping overcurrent protection.
• Fuel gauge recalibration on first install: On first use, disable any fast-charge adapter and run one complete discharge-to-charge cycle at standard current. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes load into an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the MS910 after a cell swap

The MS910's fuel gauge IC retains the discharge curve from the old, degraded cell. When a fresh cell is installed, the IC's stored curve no longer matches actual cell voltage under load. The modem radio draws a short current spike during transmission, and if the IC thinks the cell is near empty, it triggers a protective shutdown before the cell is actually depleted. One full discharge-to-charge cycle forces the IC to relearn the new curve and eliminates the false cutoff. After calibration, shutdowns should not occur above 3.5V at the cell terminals.

Phone warm near the battery during the first charge cycle

A new cell arrives with higher internal impedance than a broken-in cell. On the first charge, the charge IC pushes current into that elevated impedance, which generates more heat than normal. This is not a fault — it resolves after the first full cycle as the cell's impedance drops. If the phone stays warm beyond the second charge cycle, check that the charge adapter output does not exceed 5V/1A for this device.