MyPhone MP-S-V Compatible Battery 3.7V 1000mAh for 1080

MyPhone 1080 / 9010 / 9015TV — 3.7V Li-ion Replacement Battery (MP-S-V)

This is a 3.7V, 1000mAh Li-ion cell that replaces the original MP-S-V battery in the MyPhone 1080, 9010, and 9015TV smartphones. It fits the same footprint — 62 x 38 x 4.5mm — so it drops into the same battery bay without modification. Swap it when the original cell can no longer hold a charge through a normal day of calls, messaging, and app use.

• 1080, 9010, and 9015TV compatibility: These three MyPhone models share the same battery bay dimensions, connector pinout, and 3.7V nominal voltage rail, which is why one part number — MP-S-V — covers all three. The BMS handshake and thermistor line are identical across the platform.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a test rig matching the 1080's charge IC parameters. The BMS held the correct 4.2V charge cutoff and triggered low-voltage protection right at the expected floor. No cell imbalance flags appeared during discharge.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell.

Why the MyPhone 1080 reports the wrong battery percentage after a cell swap

The fuel gauge IC on the 1080 stores a learned discharge curve from the old cell. When a new cell goes in, the IC still references that old curve, so the percentage readout drifts from the real state of charge. This mismatch is most obvious between 40% and 15%, where the old curve and the new cell's actual voltage profile diverge the most. Run one full discharge down to automatic shutdown, then charge uninterrupted to 100% — this forces the coulomb counter to reset against the new cell and the percentage display stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem fires a high-current burst — during a call or data transfer — and the cell voltage sags below the BMS protection threshold before the fuel gauge registers the drop. The gauge still shows 20–30% but the actual cell voltage has already fallen under load. It is not a faulty battery; it is the fuel gauge IC working from a stale calibration map. Complete the recalibration cycle described above and the BMS cutoff threshold — 3.0V under load — will align with what the gauge displays.