Medion Akoya E6241 Replacement Battery 14.4V 2200mAh 40040607

Medion Akoya E6241 / S4209 / S4217 Series — 14.4V Li-ion Replacement Battery (40040607)

This is a 14.4V, 2200mAh (31.68Wh) Li-ion replacement battery for the Medion Akoya E6241, S4209, S4214, S4217, and over 30 additional Akoya notebook models. It uses OEM part numbers 40040607, 40040607A1, 40046971, A31-C15, A32-B34, and A41-B34 — check your original battery label against any of these. The physical dimensions are 269.62 × 47.52 × 20.64mm, so confirm your bay clearance if you're unsure.

• Akoya E and S series compatibility: These models share the same 14.4V voltage rail, identical connector pinout, and a common BMS communication protocol — that's why a single cell covers the E6241 alongside the S4209 through S4217 range without hardware modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Medion Akoya platform and confirmed the BMS handshake completed correctly, charge acceptance was normal across all stages, and the protection circuit tripped cleanly at the low-voltage cutoff threshold.
• Post-install calibration on Akoya notebooks: After fitting this battery, run the laptop down to hibernate cutoff on a real workload — not idle — then charge it uninterrupted to 100% without using the machine. This forces the BIOS battery learn cycle to reset against the new cell's actual capacity curve and clears the inaccurate health warning that appears after every cell swap.

BIOS reporting poor battery health immediately after fitting a new cell

The Akoya's BIOS stores historical charge data from the previous cell in an EEPROM register. When a new battery goes in, the BIOS compares incoming charge cycles against that stale reference and flags poor health before the new cell has been measured at all. This isn't a fault with the replacement — it's a calibration state. Run one full discharge-to-hibernate cycle followed by a full uninterrupted charge to 100%, and the BIOS resets its learn cycle against the new cell's actual data. After two to three cycles the health indicator should read accurately.

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

This happens when the cell voltage drops sharply under combined CPU and display load — the actual cell voltage hits the BMS cutoff threshold even though the OS fuel gauge still shows charge remaining. The fuel gauge IC hasn't yet mapped the new cell's voltage-to-capacity curve, so the percentage readout is ahead of reality. The fix is the same calibration cycle: discharge fully to hibernate under load, then charge to 100% without interruption. After one or two of these cycles the fuel gauge IC recalibrates and the shutdown point corrects to below 5%.