About this replacement
ZTE V5 / V5s Series — 3.8V Li-ion Replacement Battery (Li3824T43P3hA04147)
This is a 3.8V, 2400mAh Li-ion cell that replaces the original battery in the ZTE V5, V5s, U9180, and V9180 smartphones. It slots into the same footprint as the OEM cell — 99.80 × 41.40 × 4.50mm — and connects to the same three-pin ribbon connector. Capacity is rated at 9.12Wh, matching the original specification.
- V5 and V5s platform compatibility: The V5 and V5s share the same battery bay dimensions and BMS handshake protocol, which is why both OEM part numbers — Li3824T43P3hA04147 and Li3821T43P3hA04147 — apply to this cell family. Voltage rail and connector pinout are identical across U9180 and V9180 variants as well.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on V5 hardware. The BMS accepted charge from the device's onboard charge IC without error flags, and voltage under modem load stayed above the 3.4V cutoff threshold throughout the test cycle.
- Fuel gauge recalibration on first use: After installing this cell, disable fast charging for one full discharge-charge cycle. The phone's fuel gauge IC is calibrated to the old cell's discharge curve. Running one slow cycle lets the coulomb counter build an accurate map of the new cell before high-current charging is applied.
Sudden shutdown at 20–30% on the ZTE V5 after a cell swap
This is a voltage cliff problem, not a capacity problem. When the modem fires at full power — during a call, mobile data burst, or screen-on with background sync — the new cell draws a spike of current the fuel gauge IC hasn't profiled yet. Voltage drops sharply below the 3.4V hardware cutoff, and the phone shuts off even though the displayed percentage is still high. One full discharge-charge cycle with mobile data active recalibrates the coulomb counter and eliminates the cliff behaviour in most cases.
Phone warm near the battery during the first few charges after replacement
A new high-impedance cell generates more heat during charging than a broken-in one — internal resistance is highest before the first 10–15 cycles. The charge IC on the V5 doesn't throttle current for a new cell the way it would for a known-degraded one. Charge the phone on a flat, uncovered surface for the first three cycles and avoid charging under a case. Internal resistance drops as the cell cycles, and the warmth should reduce noticeably by cycle five.