VK365072AR Acer Liquid Z3 Replacement Battery 3.7V 1500mAh

Acer Liquid Z3 / Z130 Series — 3.7V Li-ion Replacement Battery (VK365072AR)

This is a 3.7V, 1500mAh Li-ion cell for the Acer Liquid Z3, Z130, Liquid Z130 Duo, and Liquid Z3 Dual SIM smartphones. It cross-references OEM part numbers VK365072AR, AP32 (1ICP4/40/72), and KT.0010K.005. If your original cell is swelling, draining fast, or refusing to hold charge, this is the direct swap.

• Z3 and Z130 platform fit: The Z3, Z130, Liquid Z130 Duo, and Z3 Dual SIM all share the same battery bay dimensions (75.80 × 49.80 × 4.10mm), connector pinout, and 3.7V nominal voltage rail. One cell covers the full range without any modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Z130 unit. The BMS accepted charge current correctly, the protection circuit tripped at the expected low-voltage cutoff, and the fuel gauge IC began tracking state of charge from the first cycle.
• Fuel gauge recalibration on first use: After fitting this cell, disable any fast-charge setting and run one full discharge-charge cycle at standard current. The Z3's fuel gauge IC was calibrated to your old cell's discharge curve — one slow cycle lets it map the new cell before normal use resumes.

Sudden shutdown at 20–30% on the Liquid Z3 after a cell swap

The Liquid Z3 uses a coulomb-counter fuel gauge that retains the discharge curve of the previous cell in memory. When the modem transmits or the screen peaks brightness, current draw spikes and the new cell's actual voltage drops below the threshold the gauge expects — triggering an emergency shutdown even though the reported percentage still looks reasonable. This is not a faulty cell; it's a calibration mismatch. Run one complete discharge to 3.0V and a full charge back to 4.2V without interruption. After that cycle, the gauge recalibrates and the shutdowns stop.

Phone feels warm near the battery during the first charge after replacement

A new Li-ion cell fresh from storage has higher internal impedance than a cell that has been cycled. The Liquid Z3's charge IC compensates by running slightly higher voltage at the contacts, which generates more heat until impedance drops after the first full cycle. This is normal and temporary — surface temperature should stay below 40°C. If the phone stays hot past the second charge cycle, check that the replacement cell dimensions match (75.80 × 49.80 × 4.10mm) and that the connector is fully seated with no bent pins.