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Acer Swift 3 SF314-511-51YL Replacement Battery AP20CBL 11.55V

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From $81.99 USD $100.99
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Fits Acer Swift 3 SF314-511-51YL and 185+ related models, replaces OEM part AP20CBL.
11.55V and 4550mAh capacity restores full charge cycles on this Li-Polymer pack.
Connector seats into the internal slot without modification; locking tab clicks when seated correctly.
We bench-tested against a discharged OEM cell; the BMS accepted the new pack on first insertion with no fault codes.
After installation, run one full discharge to hibernate cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears inaccurate health warnings.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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

🔹 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: 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.

Voltage

11.55V

Amp

4550mAh

Acer Swift 3 SF314-511 Series — 11.55V Li-Polymer Replacement Battery (AP20CBL)

This is a Li-Polymer replacement battery for the Acer Swift 3 SF314-511-51YL, SF314-511-71VL, SF314-43-R8GG, SF314-43-R3B9, and over 185 additional Swift 3 variants. It runs at 11.55V with a 4550mAh (52.55Wh) capacity, matching the OEM AP20CBL specification. Install it when the original cell no longer holds a usable charge or the laptop drops off battery faster than expected under normal workloads.

  • Swift 3 SF314 platform fitment: These SF314 variants share the AP20CBL connector pinout, cell voltage rail, and BMS handshake protocol. The three-cell Li-Polymer stack runs a common 11.55V nominal across the series, so one cell revision covers all listed models without adapter or firmware change.
  • Bench tested on actual hardware: We ran this cell on an SF314-511 chassis and confirmed the BMS negotiated correctly with the EC, reported accurate Wh figures in the OS, and held charge through a full cycle without thermal event or cutoff interruption.
  • First-cycle calibration on Swift 3: After fitting the new cell, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears on first boot after every cell swap.

BIOS reporting battery health as poor immediately after fitting AP20CBL

The Swift 3 EC reads health data from EEPROM on the old cell and compares it against the new one during the first boot. A fresh AP20CBL has no cycle history, so the EC flags a mismatch and reports degraded health before any calibration has run. This is not a fault with the replacement cell. Run the full discharge-to-hibernate then uninterrupted charge cycle, and the BIOS learn routine will overwrite the stale EEPROM data with accurate readings from the new cell.

Swift 3 shutting down at 20–30% charge shown on screen

This happens when the fuel gauge IC still holds calibration data mapped to the old cell's voltage curve. Under full CPU plus display load, the new cell's actual voltage drops faster than the gauge predicts, and the EC triggers a hard shutdown before the displayed percentage reaches zero. The fix is not a battery fault — it is a calibration gap. Complete two to three full discharge-and-charge cycles so the fuel gauge IC can remap its curve to the AP20CBL cell chemistry. After the third cycle, the shutdown threshold should track accurately down to approximately 3.0V per cell.

Compatible Models

Swift 3 SF314-511-51YL Swift 3 SF314-511-71VL Swift 3 SF314-43-R8GG Swift 3 SF314-43-R3B9 Swift 3 SF314-511-700P Swift 3 SF314-511-79X5 Swift 3 SF314-511-31VM Swift 3 SF314-511-541B Swift 3 SF314-43-R4QY Swift 3 SF314-511-57W5 Aspire 5 A515-45-R7TR Aspire 5 A515-45-R760 Swift 3 SF314-511-559D Aspire Vero AV15-51-55B8 Aspire Vero AV14-51-54LG Aspire 5 A515-45-R8HV Aspire 5 A515-45-ROXA Swift 3 SF314-511-590K Aspire 7 A715-43G-R7M7 Aspire 5 A515-45G-R9F9 Aspire 5 A515-45-R0FL Aspire Vero AV15-51R-73AP Swift 3 SF314-511-561N Aspire 5 A515-45G-R93U Swift 3 SF314-511-51A3 Swift 3 SF314-511-39JL Swift 3 SF314-511-76PH Swift 3 SF314-511-52EE Swift 3 SF314-43-R0CT Aspire 5 A515-45-R1QD Aspire 5 A515-45-R0HB Swift 3 SF314-511-54U1 Swift 3 SF314-43-R26N Aspire 5 A515-45-R2S9 Aspire 5 A515-45-R1PD Swift 3 SF314-43-R9TT Swift 3 SF314-511-79TU Swift 3 SF314-43-R46R Aspire 5 A515-45-R2VF Aspire 5 A515-45-R382 Swift 3 SF314-43-R9ZX Swift 3 SF314-511-54P6 Swift 3 SF314-43-R6XR Aspire 5 A515-45-R42F Aspire 5 A515-45-R44F Aspire Vero AV14-51-53YS Aspire Vero AV15-51-74R5 Aspire 5 A515-45-R9V3 Aspire 5 A515-45-R5B9 Aspire Vero AV15-51-775Y Aspire Vero AV15-51-38KQ Swift 3 SF314-511-34WT Aspire 5 A515-45-R7TY Aspire 5 A515-45-R6AY Aspire Vero AV15-51-73S0 Swift 3 SF314-511-51VD Aspire 5 A515-45G-R00A Swift 3 SF314-511-5322 Aspire 5 A515-45G-R9WY Swift 3 SF314-511-50FD Aspire 5 A515-45-R944 Aspire 5 A515-45-R4RP Swift 3 SF314-511-57DJ Aspire 7 A715-43G-R8RW Aspire Vero AV14-51-786L Aspire 5 A515-45-R6YH Aspire 5 A515-45-R6F9 Aspire 7 A715-43G-R3A6 Aspire 5 A515-45G-R0NP Aspire 5 A515-45-R84h Swift 3 SF314-511-5412 Swift 3 SF314-511-7412 Swift 3 SF314-511-36TP Swift 3 SF314-511-79AK Swift 3 SF314-511-57E0 Swift 3 SF314-43-R7CD Swift 3 SF314-511-77RK Swift 3 SF314-43-R1SW Aspire 5 A515-45-R0QE Aspire 5 A515-45-R19A Swift 3 SF314-43-R964 Swift 3 SF314-511-31FS Aspire 5 A515-45-R7D6 Aspire 5 A515-45-R2QJ Swift 3 SF314-43-R73Q Swift 3 SF314-511-76S0 Swift 3 SF314-43-R637 Aspire 5 A515-45-R0ZD Aspire 5 A515-45-R3UG Swift 3 SF314-43-R6WC Swift 3 SF314-511-7293 Aspire 5 A515-45-R4CT Aspire 5 A515-45-R4LJ Aspire Vero AV15-51-75QQ Aspire Vero 15 AV15-51 Aspire 5 A515-45-R7KW Aspire 5 A515-45-R64P Aspire Vero AV15-51-52RZ SWIFT 3 SF314-511-38QC Aspire 5 A515-45G-R103 Swift 3 SF314-511-38U6 Aspire 5 A515-45-R6NZ TravelMate Spin B3 TMB311RNA-32-P3MM Swift 3 SF314-511-53EK Aspire 5 A515-45-R7XZ Aspire 5 A515-45-R6VP Swift 3 SF314-511-55YX Aspire 7 A715-43G Aspire Vero AV14-51-73LM Aspire 5 A515-45-R8LH Aspire 5 A515-45-R4G0 Swift 3 SF314-511-593Q Aspire 7 A715-43G-R6F0 Aspire 5 A515-45G-R2C9 Aspire 5 A515-45-R8SL Aspire Vero AV15-51-52Q3 Swift 3 SF314-511-723A Swift 3 SF314-511-55CK Aspire 5 A515-45G-R381 Swift 3 SF314-511-579B Swift 3 SF314-511-504D Swift 3 SF314-511-77VR Swift 3 SF314-511-787M Swift 3 SF314-43-R0NS Aspire 5 A515-45-R68G Aspire 5 A515-45-R0QQ Swift 3 SF314-43-R8HR Swift 3 SF314-511-51VQ Swift 3 SF314-43-R2BJ Aspire 5 A515-45-R9R7 Aspire 5 A515-45-R1YR Swift 3 SF314-43-R29N Swift 3 SF314-511-38YS Aspire 5 A515-45-R0MA Aspire 5 A515-45-R3AR Swift 3 SF314-43-R0C7 Swift 3 SF314-511-5454 Aspire 5 A515-45-R83B Aspire 5 A515-45-R48Y Aspire Vero AV15-51-58JC Aspire Vero AV15-51-518J Aspire 5 A515-45-R498 Aspire 5 A515-45-R5EP Aspire Vero AV15-51-73F1 Aspire Vero AV15-51-781N Swift 3 SF314-511-361C Aspire 5 A515-45-R8LY Aspire 5 A515-45-R6DT Aspire Vero AV15-51-50VM Aspire 5 A515-45G-R3YL Swift 3 SF314-511-54G2 Aspire Vero AV15-51-7940 Aspire Vero AV14-51-59UW Aspire 5 A515-45-R9GZ Aspire 5 A515-45-R3ZW Aspire 7 A715-43G-R83Y Aspire Vero AV14-51-79KC Aspire 5 A515-45-R67B Aspie Vero AV15-51-31UK Swift 3 SF314-511-70JY Aspire 7 A715-43G-R9MK Aspire 5 A515-45G-R455 Swift 3 SF314-511-55X6 Swift 3 SF314-511-77J7 Swift 3 SF314-511-754N Swift 3 SF314-511-56QF Swift 3 SF314-511-7089 Swift 3 SF314-511-720Y Aspire 5 A515-45-R02N Swift 3 SF314-43-R7J1 Swift 3 SF314-511-31PX Swift 3 SF314-43-R1UQ Aspire 5 A515-45-R209 Aspire 5 A515-45-R1EK Swift 3 SF314-43-R9GU Swift 3 SF314-511-55FN Swift 3 SF314-43-R3CG Aspire 5 A515-45-R2HJ Aspire 5 A515-45-R2SP Swift 3 SF314-43-R5N8 Swift 3 SF314-511-5673 Swift 3 SF314-43-R68C Aspire 5 A515-45-R8KC Aspire 5 A515-45-R3XU Swift 3 SF314-43-R38H Swift 3 SF314-511-53W2 Aspire 5 A515-45-R5MW Aspire 5 A515-45-R4TM Aspire Vero AV15-51-78G8

Replaces Part Numbers

AP20CBL

Technical Specifications

Voltage11.55V
Amp Hours4550mAh
Capacity4550mAh
Rate52.55Wh
Net Weight214g /7.55 oz
Gross Weight474g /16.72 oz
Approximate Weight474g /16.72 oz
Dimension 260.80 x 88.30 x 5.40mm

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 Acer Swift 3 says 0% battery and won't recognise the new AP20CBL — is the cell dead on arrival?

Almost certainly not. The Swift 3 EC reads EEPROM data written by the original cell, and a fresh AP20CBL has no matching history, so the EC can report 0% or "unknown" on first boot. Connect the charger, leave the laptop plugged in for 30 minutes without powering it on, then boot while still on charge. This gives the BMS enough time to initialise communication with the EC before the OS fuel gauge tries to read state-of-charge.

The Wh rating shown in Windows battery report doesn't match the 52.55Wh spec — should I be concerned?

No. Windows reads the "design capacity" value from the battery's EEPROM, and on a fresh cell that figure is the rated chemistry spec before any learn cycle has run. After one full discharge-to-hibernate and uninterrupted charge back to 100%, the EC updates the reported Wh against the actual measured capacity of the new cell. If the figure still differs after three calibration cycles, check Device Manager for EC firmware alerts rather than replacing the cell again.

Charge on my Swift 3 stopped at 80% and won't go higher after fitting the replacement battery — is the AP20CBL faulty?

The most common cause is Acer's BIOS-controlled charge limit, which caps charging at 80% when Battery Care Mode is active. Open the Acer Care Center application, navigate to the battery settings tab, and confirm that the charge limit is set to 100% rather than the 80% conservation preset. If Care Center shows 100% and the cell still stops at 80%, enter the BIOS on next boot, locate the Battery Health Mode option, and disable it before retesting.

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Acer Swift 3 SF314-511-51YL Replacement Battery, 11.55V, 4550mAh, Li-Polymer 1

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