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Acer Swift 1 SF113-31-P2VH Replacement Battery AP16A4K 11.25V

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From $75.99 USD $93.99
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Fits Acer Swift 1 SF113-31-P2VH and replaces OEM part AP16A4K.
11.25V 3700mAh Li-Polymer cell restores full charge capacity to this ultrabook.
Connector seats flat into the battery bay slot with mechanical locking tab.
We tested this cell on a Swift 1 platform; BMS accepted the new pack on first insertion without fault codes.
After install, run one full discharge to hibernation cutoff then charge uninterrupted to 100% — this resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap.
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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

11.25V

Amp

3700mAh

Acer Swift 1 SF113-31 Series — 11.25V Li-Polymer Replacement Battery (AP16A4K)

This is an 11.25V, 3700mAh (41.63Wh) Li-Polymer battery for the Acer Swift 1 SF113-31 ultrabook series. It fits the SF113-31-P2VH, SF113-31-P87M, SF113-31-P1YS, SF113-31-P6YX, and over 160 additional SF113-31 variants. OEM cross-references include AP16A4K, KT.00304.003, and KT.00304.007.

  • SF113-31 series compatibility: All SF113-31 variants share the same 11.25V three-cell architecture, connector pinout, and BMS handshake protocol. The AP16A4K part number covers the full production run of this chassis — Acer did not change the battery specification mid-run on this series.
  • Bench tested on actual hardware: We ran this cell on an SF113-31 unit and confirmed the BMS negotiated charge acceptance correctly at each voltage step. The protection circuit tripped at the expected low-voltage cutoff and recovered cleanly on reconnect.
  • Post-install calibration on the Swift 1: After fitting this battery, run one full discharge down to hibernate-cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this chassis.

BIOS reporting poor battery health immediately after fitting a new cell

The SF113-31 BIOS reads health data from EEPROM fields written by the original cell during its first charge cycles. A new cell arrives with blank or factory-default EEPROM values, so the BIOS flags it as degraded — even though the cell is new. This is not a fault with the replacement battery. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% writes new baseline data and clears the warning. After two to three cycles the BIOS health indicator will update correctly.

Swift 1 shutting down abruptly at 20–30% charge shown on screen

This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The reported percentage and the real cell voltage fall out of sync, and the laptop hits the hardware low-voltage cutoff before the OS gauge reaches zero. It is most pronounced under combined CPU and display load, which pulls the cell voltage down sharply. Run two full discharge-to-hibernate and charge-to-100% cycles — after that the fuel gauge IC recalibrates and the shutdowns stop. Confirm calibration is complete when the gauge reads below 10% without triggering an unexpected shutdown.

Compatible Models

Swift 1 SF113-31-P2VH Swift 1 SF113-31-P87M Swift 1 SF113-31-P1YS Swift 1 SF113-31-P6YX Aspire One Cloudbook AO1-132-C4U8 Aspire One Cloudbook AO1-132-N14N/W Swift 1 SF113-31-C4B2 Swift 1 SF113-31-P216 Swift 1 SF113-31-P6R7 Aspire One Cloudbook 11 AO1-132-C0QL Aspire One Cloudbook 11 AO1-132-C8P1 Swift 1 SF113-31-P5C5 Swift 1 SF113-31-P7Y7 Swift 1 SF113-31-P5BP Aspire One Cloudbook AO1-132-C1T4 Aspire One Cloudbook AO1-132-C76Z Swift 1 SF113-31-C2JP Swift 1 SF113-31-C9FK Swift 1 SF113-31-P3E2 Swift 1 SF113-31-P85H Aspire One Cloudbook 11 AO1-132-C5BB Aspire One Cloudbook 11 AO1-132-C9HZ Swift 1 SF113-31-P20U Swift 1 SF113-31-C8DY Swift 1 SF113-31-P2XU Swift 1 SF113-31-P7Z0 Aspire One Cloudbook AO1-132-C53Y Swift 1 SF113-31-C035 Swift 1 SF113-31-C569 Swift 1 SF113-31-P29T Swift 1 SF113-31-P6VV Aspire One Cloudbook 11 AO1-132-C1T4 Swift 1 SF113-31-P989 SWIFT 1 SF113-31-P55R Swift 1 SF113-31-P5L7 Aspire One Cloudbook AO1-132-C2KW Aspire One Cloudbook AO1-132-C8BN Swift 1 SF113-31-C2V8 Swift 1 SF113-31-P09K Swift 1 SF113-31-P4D0 Swift 1 SF113-31-P9DZ Swift 1 SF113-31-P9PV Aspire One Cloudbook 11 AO1-132-C5MV Aspire One Cloudbook 11 AO1-132-H14N/W Swift 1 SF113-31-PO8A Swift 1 SF113-31-P49C Swift 1 SF113-31-P42V Swift 1 SF113-31-P9G6 Aspire One Cloudbook AO1-132-C5K4 Swift 1 SF113-31-C0UM Swift 1 SF113-31-C5ZH Swift 1 SF113-31-P2VE Swift 1 SF113-31-P6XP Aspire One Cloudbook 11 AO1-132-C3T3 Swift 1 SF113-31-C6BT Swift 1 SF113-31-F14P Swift 1 SF113-31-P0N9 Swift 1 SF113-31-P5WW Aspire One Cloudbook AO1-132-C3T3 Aspire One Cloudbook AO1-132-C907 Swift 1 SF113-31-C380 Swift 1 SF113-31-P0ZF Swift 1 SF113-31-P4YX Aspire One Cloudbook AO1-132-C9M9 Aspire One Cloudbook 11 AO1-132-C76Z Swift 1 SF113-31-P1NX Swift 1 SF113-31-C9SJ Swift 1 SF113-31-C10D Swift 1 SF113-31-P4MS Aspire One Cloudbook AO1-132-C0QL Aspire One Cloudbook AO1-132-C5P2 Swift 1 SF113-31-C1MG Swift 1 SF113-31-C7G2 Swift 1 SF113-31-P31R Swift 1 SF113-31-P6YV Aspire One Cloudbook 11 AO1-132-C4RS Swift 1 SF113-31-C07T Swift 1 SF113-31-C74M Swift 1 SF113-31-P6F6 Aspire One Cloudbook AO1-132-C4RS Aspire One Cloudbook AO1-132-H14N/W Swift 1 SF113-31-C3P4 Swift 1 SF113-31-P1TS Swift 1 SF113-31-P6E3 Aspire One Cloudbook 11 AO1-132 Aspire One Cloudbook 11 AO1-132-C8BN Swift 1 SF113-31-P41B Swift 1 SF113-31-C9XK Swift 1 SF113-31-P57A Aspire One Cloudbook AO1-132-C129 Aspire One Cloudbook AO1-132-C68W Swift 1 SF113-31-C243 Swift 1 SF113-31-C7UK Swift 1 SF113-31-P3DZ Swift 1 SF113-31-P84S Aspire One Cloudbook 11 AO1-132-C53Y Swift 1 SF113-31-A14Q SwiftT 1 SF113-31-C43W Swift 1 SF113-31-P2CP Swift 1 SF113-31-P72F Aspire One Cloudbook AO1-132-C52V Swift 1 SF113-31-C02P Swift 1 SF113-31-C4T6 Swift 1 SF113-31-P28U Swift 1 SF113-31-P6T9 Aspire One Cloudbook 11 AO1-132-C129 Aspire One Cloudbook 11 AO1-132-C907 Swift 1 SF113-31-P4FH Swift 1 SF113-31-P05F Aspire One Cloudbook AO1-132-C22L Aspire One Cloudbook AO1-132-C7U0 Swift 1 SF113-31-C2RB Swift 1 SF113-31-C9T8 Swift 1 SF113-31-P3TY Swift 1 SF113-31-C7ZJ Swift 1 SF113-31-P8L4 Aspire One Cloudbook 11 AO1-132-C5K4 Aspire One Cloudbook 11 AO1-132-C9M9 Swift 1 SF113-31-P697 Swift 1 SF113-31-P1U7 Swift 1 SF113-31-P3BG Swift 1 SF113-31-P865 Aspire One Cloudbook AO1-132-C5BB Swift 1 SF113-31-C0AN Swift 1 SF113-31-C5VU Swift 1 SF113-31-P2NL Swift 1 SF113-31-P6XK Aspire One Cloudbook 11 AO1-132-C3FQ Swift 1 SF113-31-P3P0 Swift 1 SF113-31-P0AW Swift 1 SF113-31-P5TS Aspire One Cloudbook AO1-132-C3FQ Aspire One Cloudbook AO1-132-C8P1 Swift 1 SF113-31-C36V Swift 1 SF113-31-P0X6 Swift 1 SF113-31-P4TK Aspire One Cloudbook AO1-132-N14N Aspire One Cloudbook 11 AO1-132-C667 Swift 1 SF113-31-C3AJ SWIFT 1 SF113-31-P2JX Swift 1 SF113-31-P4A2 Swift 1 SF113-31-P9TR Aspire One Cloudbook AO1-132-C5MV Swift 1 SF113-31-C16Z Swift 1 SF113-31-C6WU Swift 1 SF113-31-P2XA Swift 1 SF113-31-P6YM Aspire One Cloudbook 11 AO1-132-C3WT Swift 1 SF113-31-P13P Swift 1 SF113-31-P63H Aspire One Cloudbook AO1-132-C3WT Aspire One Cloudbook AO1-132-C9HZ Swift 1 SF113-31-C3J2 Swift 1 SF113-31-P1CP Swift 1 SF113-31-P5B1 Aspire One Cloudbook AO1-132 Aspire One Cloudbook 11 AO1-132-C7U0 Swift 1 SF113-31-P52E Swift 1 SF113-31-P9BN Swift 1 SF113-31-C2PV Swift 1 SF113-31-P4ZD Aspire One Cloudbook AO1-132-C0T9 Swift 1 SF113-31-P14U Swift 1 SF113-31-P259 150 Swift 1 SF113-31-P6ZZ

Replaces Part Numbers

AP16A4K KT.00304.003 KT.00304.007

Technical Specifications

Voltage11.25V
Amp Hours3700mAh
Capacity3700mAh
Rate41.63Wh
Net Weight196g /6.91 oz
Gross Weight456g /16.08 oz
Approximate Weight456g /16.08 oz
Dimension 253.66 x 149.12 x 4.10mm

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

The Swift 1 BIOS shows the new battery as "unknown" with 0% health — is the cell faulty?

No. The SF113-31 BIOS pulls health metrics from EEPROM data written by the original cell over its lifetime. A replacement cell arrives with blank EEPROM fields, so the BIOS reports unknown or 0% health by default. Run one full discharge to hibernate-cutoff, then charge uninterrupted to 100% — this initiates the BIOS battery learn cycle and writes fresh baseline values. After two full cycles the health reading will update to a normal figure.

System info shows the wrong Wh rating for this battery — it says 36Wh instead of 41.63Wh. What's causing that?

The Wh figure displayed in Windows or Acer Care Center is read from the battery's EEPROM rated-capacity field, not measured live from the cells. On a new replacement, that field may carry a factory-default or previous-generation value until the fuel gauge IC completes calibration. Run two full discharge-to-100% charge cycles and the reported Wh value will update to match the actual cell chemistry. If the value still differs after three cycles, check in Device Manager under Batteries that only one battery instance is listed — a ghost entry from the old cell can report stale data.

Charge stops at exactly 80% and the laptop will not go higher — is this the battery or the BIOS?

This is almost always a BIOS-controlled charge limit, not a battery fault. Acer's firmware on the SF113-31 includes a battery health mode that caps charging at 80% to reduce cell stress during long periods on AC power. Check Acer Care Center or the BIOS power settings under "Battery Health Mode" or "Battery Limit" and disable it. Once disabled, the charge ceiling lifts immediately and the cell will accept charge up to the full 11.25V terminal voltage.

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Acer Swift 1 SF113-31-P2VH Replacement Battery, 11.25V, 3700mAh, Li-Polymer 1

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