Wooking Jiasha ST Pro Replacement Battery 7.7V 9300mAh

Wooking Jiasha ST Pro — 7.7V Li-Polymer Replacement Battery

This 7.7V, 9300mAh (71.61Wh) Li-Polymer battery fits the Wooking Jiasha ST Pro laptop. It replaces the original cell when capacity has dropped to the point the machine can no longer hold a usable charge through a work session. Voltage and connector match the original spec.

• Jiasha ST Pro fit: The ST Pro uses a slim 5.40mm Li-Polymer cell with a fixed 7.7V rail feeding the system board. Swapping to a cell outside that voltage range will trip the laptop's protection circuit, so this replacement matches the original voltage and physical envelope exactly.
• Bench tested on actual hardware: We ran charge and discharge cycles through the BMS and confirmed the protection IC engages correctly at low-voltage cutoff. The cell accepted a full charge without thermal event and the BMS reported state-of-charge back to the host correctly after calibration cycles.
• Post-install calibration for the ST Pro: After fitting this cell, run the laptop down to hibernate-cutoff under normal load, 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 battery health as poor after installing the new cell

The Jiasha ST Pro stores battery health data in EEPROM tied to the original cell. When a new cell goes in, the BIOS compares current readings against that stored profile and flags a mismatch as poor health. This is not a fault with the replacement — it is stale data from the old cell. Run one full discharge-to-hibernate then a full uninterrupted charge to 100%. After two to three of those cycles the BIOS learn cycle updates the stored profile and the warning clears.

Laptop shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual discharge curve. The gauge loses accuracy in the lower range and the laptop hits a real voltage cliff before the displayed percentage reaches zero. The system interprets the sudden voltage drop as an emergency and forces shutdown. Run two full discharge-to-hibernate cycles without interrupting the process — after that the fuel gauge re-maps its curve against the new cell and the shutdowns stop. Confirm the cell voltage reads above 6.0V at the point the OS reports 20% before you call it a fault.