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Acer Predator Triton 300 SE Compatible Battery 15.48V 3850mAh

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From $98.99 USD $121.99
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Fits Acer Predator Triton 300 SE PT314-51S-52ML and replaces OEM part numbers AP20A7N and KT.00407.010.
15.48V 3850mAh Li-Polymer cell delivers 59.6Wh to sustain this gaming laptop through extended sessions without mid-game shutdowns.
Connector seats flush into the battery bay slot with a single plastic locking tab on the left edge for secure retention.
We ran a full charge cycle on test hardware — the BMS accepted input without fault codes and held voltage under sustained CPU load.
After installation, discharge fully to system hibernation, then charge uninterrupted to 100% to reset the BIOS battery learn cycle and clear 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

15.48V

Amp

3850mAh

Acer Predator Triton 300 SE PT314-51S Series — 15.48V Li-Polymer Replacement Battery (AP20A7N)

This is a 15.48V, 3850mAh (59.6Wh) Li-Polymer battery for the Acer Predator Triton 300 SE PT314-51S series gaming laptop. It replaces OEM part AP20A7N and KT.00407.010. Fit models include the PT314-51S-52ML, PT314-51S-52X6, PT314-51S-54AN, PT314-51S-54GB, and over 76 additional PT314-51S variants.

  • PT314-51S series fitment: All PT314-51S variants share the same 15.48V four-cell architecture, AP20A7N OEM part number, and identical BMS connector pinout — that is why one cell fits the full range without modification.
  • Bench tested on actual hardware: We cycled this cell through charge and full-load discharge on the PT314-51S platform. The BMS handshake completed without fault codes, and the cell held voltage within spec across sustained CPU plus GPU draw.
  • Post-install calibration on the Triton 300 SE: After fitting, run one full discharge until the laptop hibernates at low-battery 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 platform.

BIOS reporting battery health as poor after replacement on the PT314-51S

The Triton 300 SE BIOS reads health data stored in the old cell's EEPROM and compares it against the new cell's reported state. A fresh cell has no accumulated cycle data, so the BIOS flags it as unknown or degraded on first boot. This is not a fault with the replacement cell — it is the firmware interpreting missing history as damage. Run one full discharge-to-hibernate followed by an uninterrupted charge to 100% to begin building cycle data the BIOS can read correctly.

Laptop shuts down at 20–30% shown after battery swap

The fuel gauge IC calibrates its discharge curve against the original cell's chemistry profile. With a new cell installed, the IC has no accurate model yet, so it misjudges the voltage-to-capacity curve and triggers shutdown before the display percentage reaches zero. Under full CPU plus display load the voltage cliff arrives faster than the gauge predicts. Run two to three full discharge-recharge cycles and the fuel gauge IC will recalibrate against the new cell — shutdowns should stop occurring above 5% after that.

Compatible Models

Predator Triton 300 SE PT314-51S-52ML Predator Triton 300 SE PT314-51S-52X6 Predator Triton 300 SE PT314-51S-54AN Predator Triton 300 SE PT314-51S-54GB Predator Triton 300 SE PT314-51S-552L Predator Triton 300 SE PT314-51S-55FA Predator Triton 300 SE PT314-51S-569U Predator Triton 300 SE PT314-51S-56G7 Predator Triton 300 SE PT314-51S-56RF Predator Triton 300 SE PT314-51S-57YJ Predator Triton 300 SE PT314-51S-59SJ Predator Triton 300 SE PT314-51S-70AE Predator Triton 300 SE PT314-51S-70AY Predator Triton 300 SE PT314-51S-70Q6 Predator Triton 300 SE PT314-51S-715F Predator Triton 300 SE PT314-51S-71BQ Predator Triton 300 SE PT314-51S-71DD Predator Triton 300 SE PT314-51S-71GV Predator Triton 300 SE PT314-51S-71K0 Predator Triton 300 SE PT314-51S-71K8 Predator Triton 300 SE PT314-51S-71UP Predator Triton 300 SE PT314-51S-71VR Predator Triton 300 SE PT314-51S-71VY Predator Triton 300 SE PT314-51S-71YC Predator Triton 300 SE PT314-51S-71YP Predator Triton 300 SE PT314-51S-72A9 Predator Triton 300 SE PT314-51S-72F8 Predator Triton 300 SE PT314-51S-7309 Predator Triton 300 SE PT314-51S-730H Predator Triton 300 SE PT314-51S-73DW Predator Triton 300 SE PT314-51S-73NZ Predator Triton 300 SE PT314-51S-73P9 Predator Triton 300 SE PT314-51S-747E Predator Triton 300 SE PT314-51S-753T Predator Triton 300 SE PT314-51S-757U Predator Triton 300 SE PT314-51S-75B3 Predator Triton 300 SE PT314-51S-75JM Predator Triton 300 SE PT314-51S-765X Predator Triton 300 SE PT314-51S-766L Predator Triton 300 SE PT314-51S-76E9 Predator Triton 300 SE PT314-51S-76WH Predator Triton 300 SE PT314-51S-7795 Predator Triton 300 SE PT314-51S-77A6 Predator Triton 300 SE PT314-51S-77Y7 Predator Triton 300 SE PT314-51S-786R Predator Triton 300 SE PT314-51S-78DD Predator Triton 300 SE PT314-51S-78U8 Predator Triton 300 SE PT314-51S-797W Predator Triton 300 SE PT314-51S-79B6 Predator Triton 300 SE PT314-51S-79G6 Predator Triton 300 SE PT314-51S-79L0 Predator Triton 300 SE PT314-51s Predator Triton 300 SE PT314-51s-51NZ Predator Triton 300 SE PT314-51s-53D2 Predator Triton 300 SE PT314-51s-53W3 Predator Triton 300 SE PT314-51s-57U9 Predator Triton 300 SE PT314-51s-58AR Predator Triton 300 SE PT314-51s-599S Predator Triton 300 SE PT314-51s-70CS Predator Triton 300 SE PT314-51s-70D2 Predator Triton 300 SE PT314-51s-70D6 Predator Triton 300 SE PT314-51s-71M1 Predator Triton 300 SE PT314-51s-71UU Predator Triton 300 SE PT314-51s-721G Predator Triton 300 SE PT314-51s-728B Predator Triton 300 SE PT314-51s-72GN Predator Triton 300 SE PT314-51s-73N5 Predator Triton 300 SE PT314-51s-74WT Predator Triton 300 SE PT314-51s-76DC Predator Triton 300 SE PT314-51s-76JL Predator Triton 300 SE PT314-51s-76QN Predator Triton 300 SE PT314-51s-77SS Predator Triton 300 SE PT314-51s-78BL Predator Triton 300 SE PT314-51s-78LZ Predator Triton 300 SE PT314-51s-78T1 Predator Triton 300 SE PT314-51s-7948 Predator Triton 300 SE PT314-51s-79FK Predator Triton 300 SE PT314-51s-79GH Predator Triton 300 SE PT314-51s-79TY Predator Triton 300 Se Pt314-51s-72wr

Replaces Part Numbers

AP20A7N KT.00407.010

Technical Specifications

Voltage15.48V
Amp Hours3850mAh
Capacity3850mAh
Rate59.6Wh
Net Weight238g /8.40 oz
Gross Weight498g /17.57 oz
Approximate Weight498g /17.57 oz
Dimension 283.80 x 76.20 x 6.20mm

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 PT314-51S BIOS shows the new battery as 0% health — is the cell faulty?

It is not a faulty cell. The Triton 300 SE BIOS reads accumulated cycle data from the old cell's EEPROM; a fresh replacement has no history, so the firmware interprets that as poor health. Run one full discharge to hibernate cutoff, then charge uninterrupted to 100% to start the battery learn cycle. The health reading corrects itself within two to three cycles as the BIOS builds new reference data.

Windows is showing the wrong Wh rating in system info after I fitted the new cell — it says 56Wh, not 59.6Wh.

The Wh figure Windows displays is pulled from the EEPROM-stored rated value on the cell, which can differ slightly from the actual electrochemical capacity of the new chemistry. This is a reporting difference between the stored nominal rating and the real delivered energy — not a sign of a wrong or underspecified cell. The cell we supply is 59.6Wh. Complete two full calibration cycles and Windows will update the last full charge figure to reflect actual measured capacity rather than the EEPROM nominal.

Charge stops at 80% and will not go higher — is this a charger problem or a battery fault?

Neither. The PT314-51S ships with a BIOS-level charge limit that caps charging at 80% to reduce cell stress during long plugged-in sessions. Check Acer's Care Center software or the BIOS power settings for "Battery Health Mode" or "Charge Limit" — it is enabled by default on many units. Disable that setting, save, and reboot. The cell will then charge to 100%.

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Acer Predator Triton 300 SE PT314-51S-52ML Replacement Battery, 15.48V, 3850mAh, Li-Polymer 1

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