About this replacement
ZTE Blade L130 / GRAND MAX — 3.7V Li-Polymer Replacement Battery (Li3816T43p4h604550)
This is a 3.7V, 1450mAh Li-Polymer replacement battery for the ZTE Blade L130 and GRAND MAX smartphones. It replaces OEM part Li3816T43p4h604550 directly. Swap it in when the original cell no longer holds a useful charge or the phone shuts off unexpectedly under load.
- Blade L130 and GRAND MAX compatibility: Both models share the same 3.7V battery bay, connector pinout, and BMS handshake protocol — one cell fits both. The Li3816T43p4h604550 part number covers the full production run of each device.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Blade L130 unit. The BMS accepted the cell without fault codes, and charge IC communication stayed normal across the full voltage window from 3.0V to 4.2V.
- Fuel gauge recalibration on first use: On first use after installation, run one complete discharge-charge cycle with fast charging disabled. This lets the fuel gauge IC 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 L130
The Blade L130 uses a simple fuel gauge IC that reads cell voltage and estimates state of charge from a stored curve. When an aged or deeply discharged cell cannot sustain voltage under modem transmit or screen backlight load, the IC sees a voltage cliff and the phone cuts off — even though the displayed percentage looks safe. A new cell with lower internal resistance holds voltage under the same load, eliminating the premature cutoff. After fitting this replacement, run one full discharge to near-zero before recharging to let the IC re-anchor its curve to the new cell.
Phone not powering on after the replacement cell sat in storage
Li-Polymer cells that have self-discharged below approximately 2.5V trigger BMS lockout — the protection circuit opens and blocks current flow to prevent cell damage. The phone will not respond to the power button and may show no charge indicator when connected to USB. Connect the phone to a wall adapter rather than a PC port, which delivers a full 5V at sufficient current to wake the BMS trickle-charge circuit. Leave it connected for 20–30 minutes before attempting to power on; once cell voltage recovers above 3.0V, the BMS closes and normal charging resumes.