About this replacement
ZTE Blade A460 / Blade L4 — 3.8V Li-ion Replacement Battery (Li3822T43P3h736044)
This is a 3.8V, 1800mAh Li-ion battery that replaces the OEM cell in the ZTE Blade A460 and Blade L4 smartphones. It matches the original part number Li3822T43P3h736044 and fits the shared battery bay used across both models. Capacity is 1800mAh (6.84Wh) — drawn directly from the product specification, not estimated.
- Blade A460 and Blade L4 compatibility: Both models share the same battery form factor, connector pinout, and BMS handshake protocol — ZTE used a common battery platform across this budget Android range, so one cell covers both devices without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the Blade A460 platform. The BMS accepted the new cell without flagging a fault, and the charge IC stepped through CC/CV phases correctly across multiple cycles.
- Fuel gauge recalibration after install: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated state.
Sudden shutdown at 20–30% on the Blade A460 after a cell swap
This happens because the fuel gauge IC is still referencing the discharge curve of the old, degraded cell. When the new cell hits a voltage point the IC interprets as critically low — typically around 3.5V under modem or screen load — the phone shuts down even though usable capacity remains. The fix is one complete discharge cycle without interruption, taken down to automatic shutdown, then a full uninterrupted charge to 100%. After that cycle the coulomb counter resets against the actual new cell curve and percentage reporting stabilises.
Phone not powering on after the replacement battery sat in storage
Li-ion cells self-discharge in storage, and if the voltage drops below approximately 2.5V per cell the BMS trips into lockout to prevent damage. The phone will show nothing — no charging screen, no vibration — when you first connect a cable. Connect the phone to a wall charger rated at least 1A and leave it for 20–30 minutes before attempting to power on. The charge IC needs to push a trickle current into the cell long enough to bring voltage above the BMS recovery threshold, which sits around 2.9V, before normal charging resumes.