ZTE Blade GF3 Li3818T43P3h665344 Compatible Battery 3.7V 1500mAh

ZTE Blade GF3 / T320 — 3.7V Li-ion Replacement Battery (Li3818T43P3h665344)

This is a 3.7V, 1500mAh Li-ion replacement battery for the ZTE Blade GF3 and T320 smartphones. It matches the OEM part number Li3818T43P3h665344 and fits the same battery bay without modification. Replace this cell when the original no longer holds a useful charge across a full day of normal use.

• Blade GF3 and T320 compatibility: Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The Li3818T43P3h665344 part number covers both, so one cell fits either device without any adapter or wiring change.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a ZTE Blade GF3 unit. The BMS accepted the cell without error flags, charge termination triggered correctly at 4.2V, and the fuel gauge IC tracked state-of-charge through a full discharge without dropping out.
• First-cycle fuel gauge reset: On first use after fitting this cell, disable fast charging and run one complete discharge-charge cycle at standard rate. The fuel gauge IC on the Blade GF3 holds calibration data from the old cell. A full cycle at low current lets it recalibrate its discharge curve against the new cell before higher charge currents are applied.

Sudden shutdown at 20–30% on the Blade GF3 after a cell swap

This happens because the fuel gauge IC is still using the discharge curve from the original aged cell. When the modem fires during a call or the screen brightness spikes, current draw pulls the actual cell voltage below the shutdown threshold faster than the percentage reading suggests. The phone cuts out even though the gauge shows charge remaining. Run two full discharge-charge cycles without fast charging — after that, the coulomb counter aligns with the new cell's actual voltage cliff and the shutdowns stop.

Phone not powering on after the replacement battery sat in storage

Li-ion cells self-discharge in storage. If this battery dropped below approximately 2.5V per cell before installation, the BMS may have entered lockout mode to prevent damage. The phone will show no response — no charge indicator, no vibration. Connect the phone to a wall charger, not a USB port, and leave it untouched for 15–20 minutes. The charge IC on most ZTE devices will trickle-charge at a low current to bring the cell above the BMS wake threshold, typically around 2.9V, before switching to normal charge mode.