Compaq Presario 3000 Replacement Battery 14.8V 6000mAh

Compaq Presario 3000 Series — 14.8V Li-ion Replacement Battery (310642-001)

This 14.8V 6000mAh (88.8Wh) Li-ion battery replaces the original pack in the Compaq Presario 3000, Presario P3080, Presario 3005, and Presario 3036 notebooks. It matches the OEM voltage rail and connector pinout for the 310642-001 platform. Capacity figures are taken directly from the cell specification — 6000mAh at 14.8V nominal.

• Presario 3000 platform compatibility: The Presario 3000, 3005, 3036, and P3080 all share the same battery bay geometry, 14.8V four-cell series configuration, and SMBus communication lines — which is why they accept the same pack. Part numbers 310642-001, 310924-B25, 311227-001, PP2162S, and PP2160 all cross to this cell.
• Bench tested on actual hardware: We ran this pack on a Presario 3000 chassis and confirmed the BMS handshake completed correctly, the SMBus reported charge state without error flags, and full charge cycles completed without interruption or cutoff anomalies.
• Post-swap recalibration tip: After fitting this battery, run one full discharge down to hibernate cutoff, 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.

BIOS reporting poor battery health immediately after fitting a new cell

The Presario 3000 BIOS reads health data from EEPROM registers on the battery pack. When a new cell arrives, those registers hold factory default values that don't match the laptop's charge history — the BIOS interprets this mismatch as a degraded or unknown battery. This is a data state issue, not a fault with the new cell. Run one full discharge-to-hibernate then a full uninterrupted charge, and the BIOS learn cycle will rewrite those registers with accurate data. After two to three full cycles the health indicator should read normal.

Presario shutting down abruptly at 20–30% charge shown on screen

This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load — even though the fuel gauge IC still shows charge remaining. The fuel gauge is calibrated to a capacity curve that no longer matches the actual cell, so the percentage readout lags behind the real voltage. On the Presario 3000, full CPU load plus backlight draws enough current to push a degraded or freshly swapped cell past the voltage cliff before the gauge catches up. After the recalibration cycle described above, the fuel gauge IC realigns its curve to the new cell and the cutoff will move back to near 0V — typically below 13.2V under load.