Asus Vivobook S 14 OLED C31N2105 Compatible Battery 11.61V
Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.
EXTRAOFF
Check that your old battery model number and device model to match our description. This makes sure they work together.
We ship your order same day if you buy it before 4 PM EST.
Asus Vivobook S 14 OLED C31N2105 Compatible Battery 11.61V - is backordered and will ship as soon as it is back in stock.
Let customers speak for us
Send Your Battery Photo
Expert Technician Help
Snap a photo or video of your battery and send it to us. We'll identify the exact replacement—fast and hassle-free. Our team has helped thousands of customers find the right battery quickly and easily.
POST YOUR BATTERY IMAGE
Product & Solutions Expert
✉ sales@batteryweb.com
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 Vivobook S 14 OLED C31N2105 Compatible Battery 11.61V - is backordered and will ship as soon as it is back in stock.
Voltage
11.61V
Amp
5800mAh
Asus Vivobook S 14 OLED K3402ZA Series — 11.61V Li-Polymer Replacement Battery (C31N2105)
This is a 11.61V, 5800mAh (67.34Wh) Li-Polymer battery for the Asus Vivobook S 14 OLED K3402ZA-AOQ25031W and a wide range of compatible Vivobook 14 and 15 OLED models. OEM part numbers C31N2105 and 0B200-04140000 confirm fitment. It replaces cells that have degraded, lost hold capacity, or no longer power the laptop off AC.
- Vivobook S 14/15 OLED platform fitment: The K3402ZA, X1403ZA, M3402QA, and K3502ZA share the same 11.61V three-cell Li-Polymer architecture, connector pinout, and BMS communication protocol — one cell services all of them without modification.
- Bench tested on actual hardware: We ran the C31N2105 cell through full charge cycles on the Vivobook platform and monitored BMS handshake data. The protection circuit responded correctly to charge termination and low-voltage cutoff thresholds at each stage.
- Post-install recalibration cycle: After fitting this cell, discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without removing the AC adapter. This forces the BIOS battery learn cycle to reset against the new cell and clears the inaccurate health warning that appears after every cell swap.
Why the Vivobook BIOS reports poor battery health immediately after a cell swap
The Vivobook firmware stores battery health data in EEPROM tied to the original cell's charge history. When a new cell is installed, the BIOS reads that stored data and flags the battery as degraded — because the cycle count and capacity figures no longer match the physical cell. This is a firmware read issue, not a fault with the replacement. Running one full discharge-to-hibernate followed by an uninterrupted charge to 100% triggers the BIOS learn cycle and overwrites the stale EEPROM values. After two to three full cycles, the health readout in Windows and the BIOS will reflect the actual capacity of the new cell.
Laptop shuts down at 20–30% remaining after battery swap
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The gauge maps percentage to voltage using data from the old, degraded cell — so it hits the low-voltage cutoff point earlier than the display suggests. Under combined CPU and OLED panel load, the cell voltage drops faster than the uncalibrated gauge anticipates, triggering a shutdown. Run two full discharge cycles from 100% down to hibernate cutoff, charging fully between each run. By the second cycle the fuel gauge IC recalibrates, and shutdown should not occur above 10–12% under normal 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
The system info panel shows the wrong Wh rating after I installed the new battery — is the cell actually the right capacity?
The Wh figure shown in Windows Device Manager and third-party tools pulls from the EEPROM on the battery controller, which stores the rated design capacity of the original cell. A replacement cell with a slightly different chemistry profile will report a different Wh value until the fuel gauge IC recalibrates against actual charge cycles. The physical capacity of this cell is 67.34Wh as rated. Run two full discharge-to-hibernate and charge-to-100% cycles — the reported value will converge toward the actual spec.
BIOS shows "Battery not detected" or "0%" on the first boot after fitting the new cell — what's happening?
The Vivobook BMS requires a handshake with the BIOS on first connect; if the laptop was unplugged for an extended period during the swap, the BMS may not initialise correctly on cold boot. Shut down completely, connect the AC adapter, and power on with the charger still plugged in. This gives the BMS enough rail voltage to complete the initialisation sequence before the BIOS polls for battery status. If the 0% reading persists, hold the power button for 15 seconds with the AC adapter connected to force a full EC reset, then boot normally.
Charge is stopping at 80% and won't go higher — is this a fault with the replacement cell?
This is almost always the BIOS-controlled charge limit feature, not a cell fault. Asus laptops running MyASUS software have a Battery Health Charging mode that caps charge at 60% or 80% to reduce long-term cell stress — and this setting persists across a battery swap because it is stored in firmware, not in the battery itself. Open MyASUS, go to Customization → Battery Health Charging, and set it to Full Capacity Mode. The cell will then charge to 100% on the next cycle.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Related Products
Engineered for Performance. Built to Last.
Check out our top-rated selection of reliable products built to last. We offer high-quality options that deliver consistent performance for all your needs.
-
Up to 19% offNew arrival
BatteryWeb
C31N2005 Asus ChromeBook CX9 Compatible Battery 11.55V 4200mAh
0.99 lb
Sale priceFrom $83.99 USD Regular price $103.99Unit priceIn stock (24 units) -
-
Up to 19% offNew arrival
BatteryWeb
Huawei MateBook D 15 Replacement Battery HB4692Z9ECW 7.64V
1.06 lb
Sale priceFrom $99.99 USD Regular price $122.99Unit priceIn stock (21 units) -
-
Up to 19% offNew arrival
BatteryWeb
Asus ROG Zephyrus Duo 16 Compatible Battery C41N2103 15.4V 5800mAh
1.34 lb
Sale priceFrom $106.99 USD Regular price $131.99Unit priceIn stock (66 units) -
-
Up to 19% offNew arrival
BatteryWeb
Asus Zenbook Pro 16X OLED Compatible Battery C32N2108 11.55V 8200mAh
1.34 lb
Sale priceFrom $114.99 USD Regular price $141.99Unit priceIn stock (33 units) -
-
Up to 19% offNew arrival
BatteryWeb
Asus VivoBook Pro 16X OLED C32N2022 Replacement Battery 11.55V
1.12 lb
Sale priceFrom $111.99 USD Regular price $137.99Unit priceIn stock (51 units) -
-
Sold outUp to 19% offBatteryWeb
Asus ProArt StudioBook Pro X Replacement Battery C41N1838 15.32V
0.99 lb
Sale priceFrom $88.99 USD Regular price $109.99Unit price -
Up to 19% offNew arrival
BatteryWeb
Asus ROG Flow Z13 C41N2102 Replacement Battery 15.52V
0.78 lb
Sale priceFrom $86.99 USD Regular price $106.99Unit priceIn stock (60 units) -
-
Up to 19% offNew arrival
BatteryWeb
Asus VivoBook Pro 14X OLED C31N2019 Replacement Battery 11.61V
1.07 lb
Sale priceFrom $101.99 USD Regular price $125.99Unit priceIn stock (39 units) -
