MyPhone MP-0-1 Replacement Battery 3.7V 1500mAh Li-ion 8830

MyPhone 8830 Series — 3.7V Li-ion Replacement Battery (MP-0-1)

This is a 3.7V, 1500mAh Li-ion cell that replaces the original battery in the MyPhone 8830 and 8830 TV smartphones. It matches the OEM part number MP-0-1 and fits the physical bay without modification. Capacity figures come from product data — 5.55Wh total energy.

• 8830 and 8830 TV compatibility: Both models run the same 3.7V single-cell architecture with an identical battery bay footprint at 66.31 × 41.99 × 6.65mm. The connector pinout and BMS handshake protocol are shared across the TV and non-TV variants, so one cell covers both.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 8830 platform. The BMS accepted the cell without a fault flag, and the charge IC completed a full CC/CV cycle to 4.2V without interruption.
• First-cycle fast charge handling: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC recalibrate its discharge curve against the new cell before high-current charging is applied to an uncalibrated cell.

Why the 8830 reports wrong battery percentage after a cell swap

The 8830 uses a fuel gauge IC that builds its state-of-charge model from repeated discharge cycles against the original cell. When a new cell goes in, the IC still references the old discharge curve. It will show inaccurate percentages — sometimes 20% higher or lower than actual — until it recalibrates. Run one complete discharge to automatic shutdown followed by a full uninterrupted charge. After that single cycle, the fuel gauge maps its curve to the new cell and percentage readings stabilise.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the modem or display's minimum operating threshold before the fuel gauge reaches zero. Under combined screen-on and modem load, the cell cannot sustain voltage above the BMS cutoff even though the reported percentage looks safe. It is a calibration gap, not a faulty cell. Run one full discharge-to-cutoff cycle without interruption — the fuel gauge will anchor its low-voltage endpoint correctly and the premature shutdowns will stop.