Asus ZenBook 15 UX534FTC Compatible Battery 15.4V 4500mAh
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Asus ZenBook 15 UX534FTC Compatible Battery 15.4V 4500mAh - 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.
Asus ZenBook 15 UX534FTC Compatible Battery 15.4V 4500mAh - is backordered and will ship as soon as it is back in stock.
Voltage
15.4V
Amp
4500mAh
Asus ZenBook 15 UX534 Series — 15.4V Li-Polymer Replacement Battery (C42N1839)
This is a 15.4V, 4500mAh (69.3Wh) Li-Polymer replacement battery for the Asus ZenBook 15 UX534 series. It fits the UX534FTC-BPC1517U, UX534FT-A7601T, UX534FTC-A9076T, UX534FTC-AA196T, and over 150 additional UX534 variants sharing the same OEM part number C42N1839. It replaces a degraded or failed original cell that can no longer hold a working charge.
- UX534 series compatibility: All covered models share the same 15.4V four-cell Li-Polymer architecture, the same C42N1839 OEM part number, and the same physical connector and BMS handshake with the EC firmware. Swapping between variants in this family does not require a different battery.
- Bench tested on actual hardware: We ran this cell on UX534 hardware and confirmed the BMS handshake cleared without fault codes. The charge cycle completed without the EC triggering an early cutoff, and the protection circuit responded correctly to simulated over-discharge.
- Post-install calibration on UX534 hardware: After fitting this battery, run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false "poor health" warning that appears in MyASUS and Windows after every cell replacement.
Why the UX534 BIOS flags a new battery as degraded on first boot
The Asus EC reads charge history and cycle count data stored in the outgoing cell's EEPROM. When a new cell arrives with zeroed or mismatched EEPROM values, the BIOS compares them against its expected baseline and logs a health warning. This is a data mismatch, not a physical fault with the replacement cell. Running one full discharge-to-hibernate followed by a complete uninterrupted charge gives the EC enough data to write a new baseline and clear the warning.
UX534 shutting down with 20–30% charge showing on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The displayed percentage is based on the old cell's learned curve, so the reading drifts high — the battery hits its low-voltage cutoff while the OS still shows capacity remaining. The fix is two to three full discharge-and-recharge cycles to let the fuel gauge IC re-map the real curve against the new cell. After calibration, shutdown should not occur until the cell drops to approximately 3.0V per cell under load.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Asus
- 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
MyASUS shows the new battery health as "Poor" the moment I boot up after fitting it — is the replacement cell already dead?
It is not dead. The Asus EC reads cycle count and charge history from the old cell's EEPROM and flags any new cell with zeroed data as degraded. Run one full discharge until the laptop hibernates on its own, then charge uninterrupted to 100%. That single calibration cycle gives the EC enough data to rewrite its baseline and the "Poor" warning clears.
Windows battery icon says 98Wh but the replacement cell is rated 69.3Wh — why does the reported Wh keep changing?
The Wh figure Windows displays is pulled from the EEPROM data the EC is currently reading, not from a live measurement. After a cell swap the EC can briefly report the old cell's rated values or an averaged figure until calibration cycles settle the register. Run two full discharge-and-charge cycles and the reported Wh will stabilise at a value consistent with the 69.3Wh rating of this cell.
The UX534 charges to 80% and then stops — the charge LED goes out and nothing moves it past that point.
This is a BIOS-controlled charge limit, not a fault in the replacement cell. Asus firmware includes a "Battery Health Charging" mode that caps charge at 80% to reduce cell stress during periods of constant AC use. Open MyASUS, go to Battery Health Charging, and switch the mode from "Balanced" or "Maximum Lifespan" to "Maximum Capacity" — charging will then continue to 100%.
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