About this replacement
Toshiba Portege 2010 / R100 Series — 10.8V Li-ion Replacement Battery (PA3154U-1BAS)
This 10.8V, 1600mAh Li-ion battery fits the Toshiba Portege 2000, 2010, R100, and R200 ultraportable notebooks. It replaces OEM part numbers PA3154U-1BAS, PA3154U-1BRS, PA3154U-2BAS, and PA3154U-2BRS. Capacity is 17.28Wh — matched to the original spec for these thin-chassis machines.
- Portege 2000 / 2010 / R100 / R200 fitment: These four models share the same battery bay dimensions, connector pinout, and BMS communication protocol. One cell fits all four without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Portege R100. The BMS accepted the new cell without tripping a fault, and the charge controller reached full voltage without cutoff errors.
- Post-install calibration on the Portege platform: After fitting this battery, run the laptop down to hibernate-cutoff under normal use, 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 these Toshiba models.
BIOS reporting poor battery health immediately after fitting a new cell
The Portege BIOS reads health data from the battery's EEPROM — a small data store that holds cycle count, capacity history, and rated Wh figures. When a new cell arrives, that EEPROM carries factory-default values the BIOS hasn't seen before. The system flags it as unknown or degraded before any calibration has occurred. One full discharge-to-hibernate followed by an uninterrupted charge gives the BIOS enough data to rewrite its internal battery model and clear the warning.
Laptop shuts down abruptly when the gauge still shows 20–30% remaining
This happens when the fuel gauge IC hasn't calibrated against the new cell's actual voltage curve. The IC is still using the old cell's discharge profile, so it misreads remaining capacity and doesn't anticipate the voltage cliff. Under full CPU and display load, voltage drops faster than the gauge predicts and the system shuts off to protect the motherboard. Run two complete discharge-to-hibernate and full-recharge cycles — after that, the fuel gauge IC recalibrates and the shutdowns stop.