About this replacement
ZTE V190 / V260 / V280 Series — 3.7V Li-ion Replacement Battery (Li3706T42P3h533251)
This is a 3.7V, 600mAh Li-ion cell that replaces OEM part Li3706T42P3h533251 in ZTE V190, V260, V270, and V280 handsets. It matches the original cell dimensions at 52.73 × 31.85 × 5.19mm, so it seats correctly in the battery bay without modification. Swap this in when the original cell no longer holds charge or the phone dies unexpectedly during use.
- V190 / V260 / V270 / V280 compatibility: These models share the same battery bay footprint, connector pinout, and 3.7V nominal voltage rail. The BMS handshake protocol is identical across the series, so one cell covers all listed variants without modification.
- Bench tested on actual hardware: We cycled this cell on a V190 unit and confirmed the BMS accepted charge on the first cycle, voltage held steady at 3.7V nominal under screen and modem load, and the protection circuit tripped correctly at the low-voltage cutoff threshold.
- Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one complete discharge-to-charge cycle before normal use. The fuel gauge IC on these ZTE handsets is calibrated against the old cell's discharge curve — running a full cycle against the new cell lets the coulomb counter reset its baseline and report accurate percentages.
Sudden shutdown at 20–30% on the ZTE V190 after a cell swap
This happens when the fuel gauge IC still carries the old cell's discharge curve in memory. The phone trusts a stored voltage-to-percentage map that no longer matches the new cell, so the percentage readout looks healthy until the actual cell voltage drops below the modem's minimum operating threshold. Under screen brightness or a voice call, the modem draws a short current spike that the miscalibrated gauge cannot predict. The phone shuts off even though the displayed percentage says 25–30%. One full discharge-to-charge cycle resets the coulomb counter — charge to 100%, drain fully to auto-shutdown, then charge uninterrupted to 100% again.
Phone warm near the battery bay during the first charge after replacement
A new Li-ion cell has higher internal impedance than a worn one that has been through hundreds of cycles. The charge IC on these ZTE boards applies the same current profile regardless, so on the first charge cycle it pushes into a cell with more resistance than expected — that resistance converts some energy to heat. This is normal on the first one or two cycles and reduces as the cell's impedance settles. If the phone is still noticeably warm after three full charge cycles, the cell or charge IC may have a fault — check the charge voltage at the battery terminals with a multimeter; it should not exceed 4.2V.