Acer Ferrari 1100 Replacement Battery GARDA53 10.8V 4400mAh

Acer Ferrari 1100 Series — 10.8V Li-ion Replacement Battery (GARDA53)

This is a 10.8V, 4400mAh (47.52Wh) Li-ion replacement battery for the Acer Ferrari 1100 series notebook. It fits the Ferrari 1100, 1100-704G25Mn, 1100-552G16Mn, and 1100-704G25Mi, among others. It slots into the same bay as the original GARDA53 cell pack with no modification.

• Ferrari 1100 series compatibility: All listed Ferrari 1100 variants share the same 10.8V three-cell-pair architecture, connector pinout, and BMS handshake protocol — which is why one replacement cell pack covers the full range.
• Bench tested on actual hardware: We ran this cell on a Ferrari 1100 unit, confirmed the BMS initialised correctly, verified charge acceptance across the full 10.8V nominal range, and checked that the protection circuit tripped at the correct over-discharge threshold.
• Post-install calibration on the Ferrari 1100: After fitting this battery, run the laptop on battery power all the way down to hibernate cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell data and clears the inaccurate health warning that appears after every cell swap.

Ferrari 1100 BIOS reporting battery health as poor immediately after fitting a new cell

The Ferrari 1100 BIOS reads health data from EEPROM stored on the old battery pack. When a new cell arrives, the EEPROM registers a mismatch against the accumulated cycle history — so the system flags poor health before the new cell has run a single cycle. This is not a fault with the replacement; it is the BIOS comparing new chemistry against stale discharge records. One full discharge-to-hibernate followed by an uninterrupted charge to 100% rewrites the learn-cycle data. After two or three cycles the health indicator normalises.

Ferrari 1100 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 voltage curve. The IC still uses the old cell's mapped discharge profile, so it misreads the voltage cliff and triggers shutdown well before the battery is actually empty. It is not a defective cell — it is a calibration lag. Run two full discharge-to-hibernate cycles with an uninterrupted charge to 100% between each. After the second cycle the fuel gauge recalibrates and the shutdown point drops back to the correct low-battery threshold near 3.0V per cell.