ZTE Blade A3 2020 Li3826T43P4h695950 Compatible Battery 3.8V 2400mAh

ZTE Blade A3 2020 — 3.8V Li-ion Replacement Battery (Li3826T43P4h695950)

This is a 3.8V, 2400mAh (9.12Wh) Li-ion replacement cell for the ZTE Blade A3 2020, Blade A3Y, Blade A3 2020T, and Blade A5 2019. It directly replaces OEM part Li3826T43P4h695950. The battery fits the shared platform across these ZTE budget-tier devices, which all use the same connector pinout and BMS handshake protocol.

• Shared platform compatibility: The Blade A3 2020, A3Y, A3 2020T, and A5 2019 share a common mainboard layout and charge IC. ZTE standardised the 3.8V rail and connector across this lineup, so one cell revision covers all listed variants without wiring or fitment changes.
• Bench tested on actual hardware: We ran this cell through charge cycles on a Blade A3 2020 unit. The BMS accepted the handshake on first connection, charge IC engaged without fault codes, and the cell held voltage across light, medium, and screen-on load states.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This gives the fuel gauge IC time to map the new cell's discharge curve before high-current charging begins on an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the Blade A3 2020 after a cell swap

This happens because the phone's fuel gauge IC is still reading the old cell's discharge curve. At around 20–30%, the old calibration predicts safe voltage headroom — but the new cell hits a steeper voltage cliff under modem or display load. The SoC triggers an emergency shutdown before the percentage counter catches up. One full discharge-charge cycle resets the coulomb counter and aligns the gauge to the new cell's actual curve.

Phone warm near the battery compartment during first charge

A new, high-impedance cell converts more charge energy to heat during the first few cycles. The charge IC on these ZTE devices doesn't throttle current based on cell impedance alone — it uses voltage feedback, which is slower to react on a fresh cell. This is normal and typically resolves within two to three cycles as internal impedance drops. If the phone stays warm beyond the third full charge, check that the charge rate hasn't been locked to a fast-charge profile in developer settings.