Acer Aspire VN7-571 Replacement Battery 11.4V 4600mAh AC14A8L
This product ships directly from our Manufacturer's Warehouse and is usually delivered within 7 – 10 business days to your doorstep.
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Acer Aspire VN7-571 Replacement Battery 11.4V 4600mAh AC14A8L - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Acer Aspire VN7-571 Replacement Battery 11.4V 4600mAh AC14A8L - is backordered and will ship as soon as it is back in stock.
Voltage
11.4V
Amp
4600mAh
Acer Aspire VN7 Series — 11.4V Li-Polymer Replacement Battery (AC14A8L)
This 11.4V, 4600mAh (52.44Wh) Li-Polymer battery replaces the factory cell in the Acer Aspire VN7 notebook line. It fits the VN7-571, VN7-571G, VN7-591, and over 170 additional VN7 configurations. OEM part numbers AC14A8L, KT.0030G.001, AC15B7L, and KT.00307.003 all cross to this cell.
- VN7 platform fit: The VN7 line runs a shared 11.4V three-cell Li-Polymer architecture across its sub-models. The connector pinout, BMS handshake protocol, and charge controller voltage rails are consistent across the 571, 571G, and 591 variants — which is why a single replacement cell covers the full range.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on a VN7-591 unit. The BMS negotiated correctly with the Acer EC firmware, reported state-of-charge accurately, and did not trigger any overcurrent or temperature fault flags during a full charge sequence.
- First-cycle calibration on the VN7: After installing, run one full discharge until the laptop hibernates, then charge uninterrupted to 100% without interruption. This forces the Acer BIOS to complete its battery learn cycle and clears the inaccurate "poor health" or "replace battery" warning that appears after every cell swap.
Why the VN7 BIOS reports poor battery health after a new cell install
The Acer BIOS reads health data from EEPROM registers on the battery's fuel gauge IC. When a new cell arrives, those registers carry factory default values — not real cycle history — and the BIOS flags the battery as degraded before it has even been used. This is a firmware interpretation issue, not a fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge resets the learn cycle. After two to three calibration cycles, the BIOS health percentage will stabilise and reflect the actual cell condition.
VN7 shutting down at 20–30% charge shown on the gauge
This symptom means the cell voltage is collapsing under the combined load of the CPU and display before the fuel gauge IC expects it to. The fuel gauge was calibrated against the old degraded cell, so its voltage-to-capacity curve no longer matches the new chemistry. Under a sustained load spike — rendering, gaming, or a CPU boost event — the cell drops below the BMS cutoff threshold while the OS still shows 20–30% remaining. Run two full discharge and charge calibration cycles to realign the fuel gauge IC against the new cell. After calibration, the gauge should track accurately down to the 3.0V per cell floor.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Acer
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-Polymer
- Battery Type: Li-Polymer
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Aspire VN7 shows the battery as "0%" or "unknown" right after I installed the new cell — is it dead on arrival?
It is not a dead cell. The fuel gauge IC on the new battery carries default EEPROM register values that the Acer EC firmware reads as unrecognised or empty. Plug in the AC adapter and allow a full uninterrupted charge to 100% before drawing any load. Once the first complete charge cycle completes, the BIOS will initialise the cell data correctly and the state-of-charge will read normally.
Windows is showing this battery's capacity as a different Wh rating than what the product listing says — which one is right?
Windows pulls the Wh figure from the battery's EEPROM, which stores the manufacturer's rated design capacity. The product listing value of 52.44Wh reflects the actual measured cell capacity. These two numbers come from different sources and a small discrepancy between them is normal — it does not indicate a fault. After two or three full charge and discharge cycles, the fuel gauge IC recalculates and Windows will report a figure closer to the actual cell capacity.
The new battery charges fine but the fuel gauge jumps around wildly for the first few days — will it settle?
Yes. The fuel gauge IC inside the battery uses a voltage-to-capacity model that was reset to factory defaults when the cell left the warehouse. It needs real charge and discharge data from your specific VN7 load profile to build an accurate curve. Run three complete cycles — discharge to hibernate cutoff, then charge uninterrupted to 100% each time. By the third cycle the gauge should track within a few percent of actual remaining capacity.
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