Clevo PA71HS Replacement Battery 15V 4200mAh PA70BAT-4

Clevo PA71HS Series — 15V Li-Polymer Replacement Battery (PA70BAT-4)

This is a 15V, 4200mAh (63Wh) lithium-polymer replacement battery for the Clevo PA71HS gaming laptop and related PA70/PA71 series notebooks. It uses OEM part numbers PA70BAT-4 and 6-87-PA70S-61B00. Compatible models include the PA71HS, PA71HS-G, PA70HP6-G, and PA71HP6-G.

• PA70/PA71 platform fitment: These models share the same 15V four-cell battery architecture, connector pinout, and BMS communication protocol — meaning one cell works across the range without modification or adapter.
• Bench tested on actual hardware: We cycled this cell on a PA71 platform and confirmed the BMS handshake completed cleanly, charge acceptance reached full capacity, and no mid-cycle cutoff events were recorded under sustained CPU and display load.
• Post-install calibration on the PA71HS: After fitting this cell, run one full discharge 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.

Why the PA71HS shuts down at 20–30% remaining after a battery swap

The BIOS fuel gauge IC builds a discharge model based on the previous cell's internal resistance curve. A new lithium-polymer cell has a different voltage-to-capacity curve, so the gauge misreads the cutoff point and signals shutdown before the cell is actually empty. This shows up as abrupt shutdowns at 20–30% on the first few cycles. Running two or three full discharge-to-hibernate and uninterrupted-recharge cycles teaches the fuel gauge IC the new cell's actual voltage floor, and the shutdowns stop.

BIOS showing battery health as "poor" or capacity as 0% immediately after fitting

The BIOS reads health data from the cell's EEPROM, which still holds the degraded metrics of the old battery during the first boot. This is not a fault with the replacement cell — it is a stale data read. Boot into the BIOS battery information screen and confirm voltage is present at the expected 15V nominal. Then run a full discharge-to-hibernate cycle followed by a full uninterrupted charge; the BIOS learn cycle will overwrite the old EEPROM health values and report correct capacity on the next boot.