About this replacement
Medion Akoya E7415 Series — 14.56V Li-ion Replacement Battery (A41-D17)
This is a 14.56V, 2600mAh Li-ion replacement battery for the Medion Akoya E7415, E7415T, E7419, E7416, and related Akoya notebook models. It uses OEM part number A41-D17 and is also cross-referenced as D17LS9H, 40060854, A31-D17, and A42-D17. If your original battery no longer holds a charge or the laptop shuts down unexpectedly, this cell is a direct swap.
- Akoya E7415 series compatibility: These Akoya models share the same 14.56V four-cell battery rail, connector pinout, and BMS handshake protocol. One cell covers all variants without wiring or adapter changes.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on an Akoya E7415 chassis. The BMS communicated correctly with the EC, current tapered cleanly at full charge, and no protection trips fired during load.
- First-cycle calibration on the Akoya: After installing, run one full discharge until the laptop hibernates, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after swapping cells.
Why the Akoya E7415 reports poor battery health immediately after a cell swap
The Akoya's embedded controller reads health data cached from the old battery's EEPROM. When a new cell goes in, that cached data does not clear automatically — the EC simply reads stale figures and flags the battery as degraded. This is not a fault with the new cell. Running the full discharge-to-hibernate then uninterrupted charge cycle forces the EC to rewrite its learn table against the new cell's actual capacity. After one or two complete cycles, the health status normalises.
Akoya E7415 shutting down at 20–30% shown on the fuel gauge
This happens when the cell voltage drops below the EC's cutoff threshold under combined CPU and display load, even though the fuel gauge still shows charge remaining. The fuel gauge IC has not yet calibrated its discharge curve to the new cell's chemistry. The displayed percentage and actual voltage diverge until the IC completes two or three full calibration cycles. Run the laptop without plugging in until it hibernates — do not interrupt — and the gauge will tighten up, with shutdown aligning to roughly 10–12% or below 11.4V under load.