Replacement Battery Specification
- Battery Model: B31N1911
- Capacity: 42Wh
- Voltage: 11.55V
- Battery Type: Li-ion
- Cell: Made in China, high quality guarantee
- Color: Black
- Condition: Replacement Battery (100% Brand New, 1-year warranty!)
Replace Part Number
- B31N1911
- C31N1911
Compatible Laptop Model
- ASUS VivoBook Flip TP470EA Series
- ASUS VivoBook Flip TP470EZ Series
- ASUS VivoBook Flip 14 TM420IA
- ASUS VivoBook 14 M413D Series
- ASUS VivoBook 14 M413DA-EK162T
- ASUS VivoBook 14 M413DA-EK007T
- ASUS Notebook X421DA Series
- ASUS Notebook X421EA Series
- ASUS Notebook X421EP Series
- ASUS Notebook X421FF Series
- ASUS Notebook X421FQ Series
- ASUS Notebook X421JA Series
Product Features
- Extended Battery Life: 42Wh capacity delivers reliable power for ASUS VivoBook Flip and VivoBook 14 series laptops, providing hours of productivity for work, study, and entertainment on the go.
- OEM-Grade Quality: Manufactured with premium lithium-ion cells to meet or exceed original ASUS specifications, ensuring reliable performance and long-term durability for daily use.
- Wide Compatibility: Designed specifically for ASUS VivoBook Flip TP470EA/TP470EZ/TM420IA, VivoBook 14 M413D/M413DA, and Notebook X421DA/X421EA/X421EP/X421FF/X421FQ/X421JA series, ensuring perfect fit and optimal performance across multiple models.
- Advanced Li-ion Technology: High-quality lithium-ion cells deliver stable voltage output, efficient charging cycles, and longer battery lifespan with support for hundreds of charge-discharge cycles.
- Easy Installation: Direct drop-in replacement for original ASUS battery with simple plug-and-play design, no technical expertise required for battery swap.
- Comprehensive Safety Protection: Built-in protection circuitry guards against overcharge, over-discharge, short-circuit, and overheating to ensure safe operation and protect your laptop.
Why Choose This Battery?
This B31N1911 replacement battery is the perfect power solution for professionals, students, and mobile users with ASUS VivoBook Flip and VivoBook 14 series laptops. With 42Wh capacity and 11.55V output, it delivers reliable runtime for productivity tasks, web browsing, video streaming, and creative work, keeping your laptop running when you need it most.
Compatible with ASUS VivoBook Flip TP470EA/TP470EZ/TM420IA, VivoBook 14 M413D/M413DA, and Notebook X421DA/X421EA/X421EP/X421FF/X421FQ/X421JA series, this battery is backed by a 1-year warranty and rigorous quality testing. Perfect for business professionals, students, and anyone who needs reliable backup power for their ASUS VivoBook laptop.
Restore your laptop's mobility and productivity with this affordable, high-quality replacement battery that delivers the dependable power you need for all-day computing.
Note:
This is not a complete list or inclusion of all compatible laptop models. You can open the back of your laptop to check the original battery model. If you have any compatibility questions, please contact us online.The casing is made of durable materials, the mainboard adopts advanced technology, and the battery core is produced with high-quality raw materials to ensure that it will not be damaged after long-term use.
Our products are equipped with multiple protection technologies such as overvoltage, overcurrent, and overcharge to effectively protect the safety of batteries and equipment.
Shipping Methods
| Shipping Methods | Ship To | Est. Delivery Time | Shipping Cost | Taxes & Fees |
|---|---|---|---|---|
| USPS / DHL | United States | 10-15 business days | Free | Free |
| Canada Post | Canada | 10-15 business days | Free | Free |
| Royal Mail / Yodel | United Kingdom | 15-20 business days | Free | Free |
| DHL | Germany | 15-20 business days | Free | Free |
| La Poste | France | 15-20 business days | Free | Free |
| Correios | Mexico/Spain/IT | 15-25 business days | Free | Free |
| Local Carriers | SE Asia / East Asia | 5-10 business days | Free | Free |
| Local Carriers | Rest of Europe | 20-25 business days | From $5.99 | Free |
| Local Carriers | UAE / Saudi Arabia / Israel | 16-20 business days | From $7.99 | Free |
📦 Shipping & Tracking Information
Looking for faster shipping? We offer local warehousing services. Please visit our "Local Delivery" page for items available for immediate dispatch.
1. How to Track Your Package:
Please choose the tracking link that corresponds to your destination:
- Europe & The Americas: 17track.net/en
- The Middle East: mena56.com
- Asia: 17exp.kingtrans.cn
Need Help?
If you cannot find your package on any of the above websites, please contact us immediately.
📧 Email: sales@batterymall.com / info@batterymall.com
📱 WeChat/WhatsApp: (+86) 198 6775 1872 / (+86) 191 2767 3310
🚚 Estimated Delivery Time
(1) Shipping from China:
- To Asia: 5-20 business days
- To North America: 10-15 business days
- To Europe/South America: 15-20 business days
(2) Shipping from Local Warehouses:
- From US Warehouse: 3-5 business days
- From European Warehouse: 2-10 business days
- From Russian Warehouse: 3-5 business days
Please note: Exact arrival times depend on the specific country and customs processing.
⚠️ Tax & Customs Information:
Global product prices include customs duties (some countries require a tax ID). Please refer to the settlement invoice for specific shipping costs. Special handling is required if your package is inspected.
Payment Methods
Paypal
Payments by PayPal, no PayPal account required. Paypal is safe and free for buyers.
PayPal account: Payment@batterymall.com
Account Name: ShenZhen KingSener Science and Technology Co., Ltd
Credit or debit card
VISA, MasterCard, the United States n Express,Maestro & Laser Card, APPLE Pay,etc.
PayPal never shares your financial information with us.
WeChat Pay
Currently only supports QR code payment. Please contact WeChat customer service and go to WeChat App to scan the QR code to complete the payment.
Google Pay
Pay with Google Pay, which is more convenient and faster.
Apple Pay
If you use an Apple device, you can use Apple Pay to pay, which is more convenient and faster.
Bank Transfer
Q&A
Quick FAQ:Laptop Battery Care & Troubleshooting
- How long does a KingSener battery last?2 to 3 years (approx. 500-800 charge cycles) under normal temperatures.
- Laptop says "Battery Not Detected". How to fix?1. Hard Reset: Unplug AC, remove battery, hold power button for 30 seconds.
2. Clean Contacts: Wipe metal connection pins.
3. Reset Drivers: Uninstall battery drivers in Device Manager, then restart.
4. Update BIOS: Ensure motherboard firmware is up to date. - Can I leave my laptop plugged in 24/7?Yes, the built-in TI chip prevents overcharging. Tip: To prevent long-term cell swelling, unplug and drain the battery to 40% twice a month.
- How do I store a laptop battery long-term?Store it at 50% charge in a cool, dry place. Never store at 0% or 100%. Cycle the battery every 3 months to maintain chemical activity.
-
Are KingSener batteries safe?Yes. All batteries feature built-in IC protection against short-circuits, over-voltage, and overheating. Fully CE, FCC, and RoHS certified.