About this replacement
Acer Aspire V17 Nitro — 15.2V Li-ion Replacement Battery (AC16A8N)
This is a 15.2V, 4400mAh (66.88Wh) Li-ion replacement battery for the Acer Aspire V17 Nitro series. It fits the VN7-793G, VN7-792G-74Q4, VN7-791G-792A, and related VN7 variants. The OEM part numbers are AC16A8N and KT.0040G.009.
- VN7 series compatibility: The VN7-791G, VN7-792G, and VN7-793G all share the same 15.2V four-cell battery architecture and use identical connector pinouts and BMS handshake protocols — that is why one cell covers the full VN7 lineup.
- Bench tested on actual hardware: We ran this cell on a VN7-793G unit. The BMS initialised correctly, the BIOS recognised the pack within one boot cycle, and the charge controller stepped through CC/CV phases without flagging any pack errors.
- Post-swap calibration on the V17 Nitro: After installing, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap on this platform.
Why the V17 Nitro BIOS reports poor health immediately after a battery swap
The V17 Nitro stores battery health data in EEPROM on the old pack. When a new cell goes in, the BIOS reads that stale EEPROM data and flags the battery as degraded before it has run a single cycle. This is not a fault with the replacement cell — it is the BIOS comparing fresh chemistry against historical wear metrics it inherited. Running the full discharge-to-hibernate then uninterrupted charge-to-100% sequence overwrites the learn cycle and forces the BIOS to build a new health baseline. After two to three full cycles, the health indicator normalises.
Laptop shuts down at 20–30% charge shown on the V17 Nitro
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The IC is still using the old cell's discharge profile, so it misreads the voltage cliff and triggers a shutdown well before the cell is actually empty. The fix is to let the laptop discharge naturally to hibernate-cutoff — do not force-shutdown — then charge to 100% uninterrupted. Repeat this two to three times. After calibration, the OS fuel gauge tracks accurately and the early shutdown stops.