SRF StarAddict 2 Plus Replacement Battery 3.7V 1400mAh

SRF StarAddict 2 Plus — 3.7V Li-ion Replacement Battery

This is a 3.7V, 1400mAh (5.18Wh) Li-ion battery for the SRF StarAddict 2 Plus smartphone. It replaces a degraded or failed original cell and restores normal charge-holding capacity. Physical dimensions are 59.40 x 46.00 x 5.10mm — verify against your existing cell before fitting.

• StarAddict 2 Plus fit: This cell matches the voltage rail and footprint the StarAddict 2 Plus motherboard expects. The connector pinout and BMS communication lines align with what the charge IC on this phone requires to begin a charge cycle.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench. The BMS accepted charge handshake correctly, held voltage under simulated screen and modem load, and did not trip protective cutoff at normal operating draw.
• 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.

Sudden shutdown at 20–30% on the StarAddict 2 Plus after a cell swap

A new cell has a slightly different discharge curve than the original. The fuel gauge IC still holds calibration data from the old cell, so it misreads remaining capacity. When the phone hits a steep voltage drop — typically under modem transmit or display brightness spikes — the protection circuit cuts power before the percentage reaches zero. This is not a faulty battery. Run one full discharge to below 5% and a complete charge to 100% without interruption, and the coulomb counter will recalibrate to the new curve.

Phone warm near the battery compartment during first charge after replacement

A fresh cell starts with higher internal impedance than a cell that has been cycled. The charge IC on the StarAddict 2 Plus applies constant current into that higher resistance, which converts more energy to heat than usual. Warmth during the first one or two charges is normal and drops off as impedance settles. If the phone becomes hot — not just warm — or the charge IC halts the cycle, check that the replacement cell contacts are seated flat against the connector with no debris on the pads. Target a charge environment below 35°C for the first cycle.