LG 15N365-K Replacement Battery 14.8V 2600mAh Li-ion

LG 15N365-K / 15N530 Series — 14.8V Li-ion Replacement Battery

This is a 14.8V, 2600mAh (38.48Wh) Li-ion replacement battery for LG 15N365-K, 15N365-T, 15N365-T.AF70L, 15N530, and related notebook models. It slots into the same bay as the original cell with no modification. Voltage and connector match the OEM specification for these LG ultrabook-class laptops.

• 15N365 and 15N530 platform fit: These models share a common battery bay geometry, connector pinout, and BMS communication protocol, which is why a single cell covers the full range. The 4-cell 14.8V configuration is fixed across all variants in this series — swapping to a different voltage would trip the system board protection circuit.
• Bench tested on actual hardware: We cycled this cell on a 15N365-series board and confirmed the BMS handshake completes correctly — charge current begins within seconds of plugging in, and the fuel gauge IC begins tracking state-of-charge without throwing an unknown-battery error.
• First-cycle calibration on the 15N365: After installing, run the laptop on battery until it reaches the hibernate cutoff, then charge uninterrupted to 100% without unplugging mid-cycle. This gives the BIOS battery-learn routine a full data set against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the 15N365 BIOS flags a new battery as poor health immediately after swap

The BIOS on these LG notebooks stores battery health data in an EEPROM table tied to the original cell's charge history. When a new cell goes in, that table has no matching data, so the firmware reads the mismatch as degradation. This is not a fault with the replacement cell — it is a calibration state. Running one complete discharge-to-hibernate then a full uninterrupted charge gives the BIOS enough cycle data to rewrite the health register accurately. After one or two full cycles, the health indicator returns to normal.

Laptop shuts down at 20–30% shown on the gauge after battery swap

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge reports 25% remaining, but the cell voltage has already dropped below the minimum threshold the system board will sustain under combined CPU and display load — so the laptop cuts out. It is not a faulty battery. Run two full discharge-to-cutoff and charge-to-100% cycles without interruption. After the second cycle, the fuel gauge IC maps the new cell's voltage curve correctly and the shutdowns stop. Confirm the cell is holding above 14.0V at 20% shown before ruling out a genuine capacity issue.