About this replacement
Toshiba Satellite T110 / Pro T2150CDS — 12V Ni-MH Replacement Battery (PA2435)
This is a 12V Ni-MH replacement battery rated at 4000mAh (48Wh) for the Toshiba Satellite T110, Satellite Pro T2150CDS, Satellite Pro T2130CS, T2130, and over 74 additional compatible models. It slots in where the original PA2435, PA2437, and PA2439 series cells fit. When the factory cell degrades and the laptop loses portability, this cell restores unplugged operation.
- Satellite T-series compatibility: These models share a common 12V Ni-MH battery bay, connector pinout, and charge-management circuit. The PA2435, PA2437, and PA2439 part numbers are interchangeable across the T110 and Pro T2000-series lineup because Toshiba used the same battery controller across that generation.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge passes on a Satellite T110 unit. The charge controller accepted the cell without fault codes, current draw tracked within spec across all charge phases, and the pack reached rated capacity without thermal events.
- Ni-MH first-cycle conditioning: After installing, run the battery down to hibernate cutoff without interruption, then charge uninterrupted to 100%. Ni-MH cells in Toshiba's charge circuit need this full-range pass to let the BIOS battery learn cycle reset against the new cell's actual capacity baseline and clear the health warning that typically appears after a cell swap.
BIOS reporting poor battery health immediately after fitting the replacement cell
Toshiba's BIOS stores battery health data in EEPROM and compares it against the previous cell's charge history on every boot. A freshly fitted cell has no matching history, so the BIOS flags it as degraded or unknown. This is not a fault with the replacement. Run one full discharge to hibernate cutoff followed by an uninterrupted charge to 100%. After one or two complete cycles the BIOS learn cycle rewrites the EEPROM data against the new cell and the health warning clears.
Laptop shuts down abruptly at 25–30% charge shown on the fuel gauge
This happens because the fuel gauge IC calibrated its empty-point against the old degraded cell, which had a much earlier voltage cliff. When the new cell still holds 12V at 25%, the gauge incorrectly triggers a low-battery shutdown. The fix is a calibration cycle: discharge the laptop under normal load all the way to automatic hibernate, then charge to 100% without unplugging. Repeat this twice and the fuel gauge IC re-anchors its cutoff reference to the new cell's actual voltage curve.