Asus Zenfone 2 Laser ZE500KG Compatible Battery 3.7V 1800mAh

Asus Zenfone 2 Laser ZE500KG / ZE500KL — 3.7V Li-ion Replacement Battery (0B200-01480200)

This 3.7V Li-ion cell replaces the original battery in the Asus Zenfone 2 Laser ZE500KG and ZE500KL. It carries 1800mAh (6.66Wh) and matches OEM part numbers 0B200-01480200, C11P1428, and B11P1428. Swap it when the original cell no longer holds voltage under screen or modem load.

• ZE500KG and ZE500KL compatibility: Both models run the same Snapdragon 410 voltage rail and share an identical connector pinout and BMS handshake — one cell covers both SKUs without modification.
• Bench tested on actual hardware: We cycled this cell through the Zenfone 2 Laser charge IC and confirmed the BMS communicates state-of-charge data correctly to the OS fuel gauge from the first full charge cycle.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard current. This lets the fuel gauge IC map its coulomb counter against the new cell's discharge curve before fast charging pushes higher current into an uncalibrated cell.

Sudden shutdown at 20–30% on the Zenfone 2 Laser after a cell swap

The Zenfone 2 Laser's fuel gauge IC inherits the discharge curve of the old, degraded cell. When a fresh cell is installed, the IC's stored curve no longer matches actual cell voltage, so the OS reads 25% state-of-charge while real voltage is already near 3.55V under modem transmit load. The phone shuts down because it hits the hardware low-voltage cutoff before the software counter reaches zero. One full discharge to shutdown followed by an uninterrupted charge to 100% lets the coulomb counter resync to the new cell and eliminates premature cutoff.

Battery percentage jumping erratically after replacement

Erratic percentage readings — jumping from 60% to 40% in seconds, or spiking back up without charging — come from the fuel gauge IC still referencing calibration data written by the worn cell. The IC's internal model no longer predicts cell voltage accurately, so reported percentage swings when load changes. Run two full discharge-charge cycles with the screen at moderate brightness and mobile data active; this forces the IC to rewrite its reference table. After the second cycle, readings stabilise and track actual cell voltage within a few percent.