About this replacement
Acer TravelMate 350 Series — 11.1V Li-ion Replacement Battery (BTP-41D1)
This is an 11.1V, 3600mAh (39.96Wh) Li-ion replacement battery for the Acer TravelMate 350, 351, 352, and 353 series laptops. It replaces OEM part numbers BTP-41D1, BTP41D1, and 60.45H03.011. Fits directly into the original battery bay with no modification.
- TravelMate 350 series compatibility: The 350, 351, 352, and 353 share the same battery bay format, connector pinout, and 11.1V three-cell power rail. One cell fits the full group — no adapter or wiring change needed.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on TravelMate hardware. The BMS communicated correctly with the system board, accepted a full charge, and held voltage within spec across the discharge curve.
- First-cycle reset after install: 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 on the first boot after any cell swap.
BIOS reporting poor battery health immediately after swap
The TravelMate BIOS reads health data stored in the old cell's EEPROM and carries a cached state into the first session with the new battery. This is not a fault with the replacement cell — it is stale data from the previous unit. Running one full discharge-to-hibernate then a full uninterrupted charge forces the BIOS to rewrite its battery learn data against the new cell. After that cycle, the health indicator should return to normal.
TravelMate 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 chemistry. The gauge shows 20–30% remaining, but the cell voltage has already dropped below the threshold the system board needs to sustain the CPU and display together under load. It reads as a sudden shutdown rather than an orderly hibernate. Run two to three full discharge-and-charge cycles — the fuel gauge IC recalibrates against real cell behaviour each time. After calibration, the gauge and actual voltage should align, with low-battery warnings triggering above 3.0V per cell.