About this replacement
BLU Life One X2 — 3.85V Li-Polymer Replacement Battery (TLP16K18)
This 3.85V, 3000mAh Li-Polymer cell replaces the original battery in the BLU Life One X2 smartphone, covering model numbers L0090 and L0091UU. It matches OEM part numbers TLP16K18, TLP1611, TLP16G30, and C766144300T. Physical dimensions are 75.52 × 61.00 × 4.20mm — confirm these against your existing cell before installing.
- Life One X2, L0090, L0091UU compatibility: These three model numbers share the same battery bay geometry, connector pinout, and BMS handshake protocol. One cell covers all three without modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the BLU Life One X2 platform. The BMS accepted the cell, charge termination triggered correctly at 4.35V, and no protection cutoffs fired during load testing.
- First-cycle fuel gauge calibration: On first use after installation, disable fast charging and run one full discharge down to automatic shutdown, then charge to 100% on standard current. This lets the fuel gauge IC map the new cell's discharge curve before the OS begins reporting percentage from it.
Why the Life One X2 reports wrong battery percentage after a cell swap
The fuel gauge IC on the Life One X2 uses a coulomb counter that was calibrated against the original cell's internal resistance and voltage curve. When a new cell goes in, that stored calibration no longer matches the actual discharge profile. The OS reads percentage from the IC, not from the cell directly, so what you see on screen can be off by 10–20% until the IC relearns. One full discharge-to-shutdown cycle followed by a complete charge recalibrates the counter and brings percentage reporting back into alignment.
Sudden shutdown at 20–30% on the replacement cell
This happens when the modem or display draws a current spike the cell cannot sustain without dropping below the BMS cutoff voltage — typically around 3.0V per cell. A fresh replacement with an uncalibrated fuel gauge makes this worse because the phone thinks it has more charge left than it does at that load. The fix is the same calibration cycle: run the phone down to automatic shutdown under normal use, then charge fully without fast charging active. After one complete cycle, the fuel gauge IC has an accurate low-voltage reference and the phone will begin shutting down at the correct threshold rather than mid-use.