Dopod A6288 Replacement Battery 3.7V 2200mAh TWIN160

Dopod A6288 — 3.7V Li-ion Replacement Battery (TWIN160)

This 3.7V, 2200mAh Li-ion cell replaces the original battery in the Dopod A6288 smartphone. It covers OEM part numbers TWIN160, 35H00121-05M, and BA S380. Capacity figure is taken from product data at 8.14Wh.

• A6288 fit confirmation: The A6288 uses a single-cell 3.7V Li-ion pack with a standard three-contact connector carrying positive, negative, and a thermistor line. All three OEM part numbers cross-reference to the same connector pinout and BMS handshake protocol, so this cell seats and communicates correctly with the device's charge IC.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on an A6288 unit. The BMS reported cell voltage correctly to the OS at rest, and the charge IC accepted a full charge cycle without tripping overcurrent protection or dropping into trickle-charge mode prematurely.
• Fuel gauge recalibration on first use: Disable fast charging for the first complete discharge-charge cycle after installation. The fuel gauge IC on the A6288 was calibrated to the original cell's discharge curve — running one slow cycle against the new cell lets the coulomb counter reset its endpoints before high-current charging begins.

Sudden shutdown at 20–30% on the A6288 after a cell swap

This happens when the fuel gauge IC still holds the old cell's discharge curve in memory. The A6288's modem and screen together pull current spikes the new cell handles fine under normal load, but if the coulomb counter hasn't recalibrated, it maps the wrong voltage to the wrong state-of-charge percentage. When actual cell voltage drops below roughly 3.5V under a screen-on or call load, the BMS cuts output to protect the cell — even though the OS display still reads 25%. One full slow discharge to shutdown followed by a full charge corrects the mapping.

Phone warm near the battery compartment during first charge

A new cell arrives with slightly elevated internal impedance compared to a broken-in cell. During the first charge cycle, the A6288's charge IC pushes current into higher resistance, and that energy differential becomes heat. This is normal and reduces after two or three cycles as the cell's impedance settles. If the device stays warm beyond the third cycle, check that the charge IC isn't stuck in a constant-voltage phase — connect to a USB source and confirm the charging indicator clears within two hours at a measured 3.7–4.2V terminal voltage.