About this replacement
Medion Akoya E7415 Series — 10.8V Li-ion Replacement Battery (A41-D17)
This 10.8V, 5200mAh (56.16Wh) Li-ion battery replaces the original cell in the Medion Akoya E7415, E7415T, E7419, E7416, and 26 additional Akoya variants. It matches the OEM voltage rail and connector pinout for the A41-D17 battery family. Cross-compatible part numbers include D17LS9H, 40060854, 40050714, A31-D17, A32-D17, A42-D17, and D17LC29H.
- Akoya E7415 series compatibility: These models share the same 10.8V three-cell architecture, connector housing, and BMS communication protocol — which is why one battery covers the full range from the E7415 through to the E7419 without adapter changes.
- Bench tested on actual hardware: We cycled this cell on an Akoya E7415 chassis and confirmed the BMS handshake completes correctly — the system exited the "plugged in, not charging" state and accepted a full charge without throttling.
- Post-install discharge cycle for Akoya notebooks: After fitting, run the laptop on battery until it hibernates from low charge, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the false health warning that appears after every cell swap on this platform.
BIOS reporting poor battery health immediately after fitting a new cell
The Akoya E7415 BIOS reads health data from EEPROM stored in the original battery pack — not from the new cell's actual chemistry. When a replacement goes in, the BIOS compares live readings against that stale EEPROM baseline and flags a mismatch as "poor health." This is a firmware calibration issue, not a fault with the replacement cell. Run one full discharge-to-hibernate cycle followed by an uninterrupted charge to 100%, and the BIOS learn cycle will rewrite the baseline against the new cell.
Laptop shuts off at 20–30% charge shown on the fuel gauge
This happens when the fuel gauge IC has not yet calibrated against the new cell's voltage curve. Under combined CPU and display load, the cell voltage drops faster than the uncalibrated gauge expects — the system reads a cliff drop and triggers an emergency shutdown before the displayed percentage reaches zero. It is not a faulty cell. Run two full discharge-to-hibernate cycles with an uninterrupted charge between each, and the fuel gauge IC will align its curve to the new cell. After calibration, the laptop should remain stable down to approximately 10.8V at the cell terminals before cutoff.