Compaq LTE 5150 Replacement Battery 12V 4000mAh 213564-001

Compaq LTE 5150 Series — 12V Ni-MH Replacement Battery (213564-001)

This is a 12V, 4000mAh (48Wh) Ni-MH replacement battery for the Compaq LTE 5150 notebook computer. It also fits the LTE 5000CX, LTE 5380, LTE 5000, and over 20 additional LTE-series models. OEM part numbers covered include 213564-001, 213564-002, 213564-003, and 213511-001.

• LTE 5000-series compatibility: These models share a common 12V battery bay form factor and connector pinout. The BMS handshake across this series uses the same charge-termination logic, so one cell fits the full bracket of LTE notebooks listed above without modification.
• Bench tested on actual hardware: We cycled this cell on the LTE platform and confirmed the BMS reached full charge-termination at the correct voltage ceiling. Discharge curves held steady through multiple cycles with no premature cutoff at the mid-range state-of-charge.
• Ni-MH first-cycle conditioning: After installing, run one complete discharge to the hibernate cutoff point, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this platform.

Why the LTE 5150 BIOS flags a new battery as poor health immediately after swap

The LTE 5150 stores battery health data in EEPROM on the old cell. When a new cell goes in, that EEPROM data is gone and the BIOS has no reference point — so it defaults to reporting poor or unknown health. This is not a fault with the replacement cell. Running one full discharge-to-hibernate followed by an uninterrupted charge gives the BIOS enough data to rebuild its health estimate. After two or three full cycles, the health indicator normalises.

LTE 5150 shutting down at 20–30% charge shown on the gauge

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual capacity. The gauge inherited calibration data from the old, degraded battery, so the percentage shown no longer maps accurately to real cell voltage. Under combined CPU and display load, the actual cell voltage drops below the cutoff threshold while the gauge still reads 20–30%. Run two full discharge-to-hibernate cycles without interruption. After the second full cycle, the fuel gauge IC recalibrates and the shutdown point corrects to near 0%.