Product Overview
The C21N1818-1 is a premium OEM-grade replacement battery that restores dependable 32Wh (4212mAh) of power to your ASUS VivoBook. Built to the verified 7.6V standard specification, it ends random shutdowns, rapid drain and charging failures so your laptop runs as smoothly as the day it was new.
Engineered for a drop-in fit with ASUS VivoBook 14 X412, VivoBook 15 X512 and VivoBook Flip 14 TP412 (TP412UA, TP412FA) series laptops, this battery combines grade-A Li-ion cells with built-in overcharge, over-discharge and short-circuit protection for safe, stable, everyday performance.
Specifications
| Standard Model | C21N1818-1 |
| Battery Type | Li-ion |
| Voltage | 7.6V |
| Capacity | 32Wh / 4212mAh |
| Condition | 100% Brand New Replacement |
| Warranty | 1-Year Warranty |
Replace Part Numbers
This replacement battery is a direct match for the following original part numbers:
- C21N1818-1
- 2ICP7/54/83
Compatible Models
Fits the following ASUS laptop series (always confirm the battery model printed on your original battery before ordering):
- ASUS VivoBook Flip 14 TP412 Series: TP412UA, TP412FA
- ASUS VivoBook 14 X412 Series
- ASUS VivoBook 15 F512 Series: F512DA, F512FA, F512FB, F512FJ, F512FL, F512JA, F512JP, F512UA
- ASUS VivoBook 15 X512 Series: X512DA, X512DK, X512FA, X512FB, X512FJ, X512FL, X512JA, X512JF, X512JP, X512UA, X512UB, X512UF
- ASUS VivoBook 15 R564 Series: R564DA, R564FA, R564JA
- ASUS VivoBook S512 Series: S512DK, S512FA, S512FB, S512FL, S512UA
- ASUS VivoBook A512 Series: A512FA, A512FB, A512FL, A512JA, A512JP, A512UA, A512UF
- ASUS VivoBook K512 Series: K512FA
- ASUS V5000 Series: V5000, V5000F, V5000FA, V5000FB
FAQ
Will the C21N1818-1 battery fit my ASUS VivoBook Flip 14 TP412?
Yes. The C21N1818-1 is the factory-standard battery for ASUS VivoBook Flip 14 TP412UA and TP412FA, and it also serves VivoBook 14 X412 and VivoBook 15 X512 series models that use the same part. For absolute certainty, power off your laptop and check the model number printed on the original battery.
How long will a full charge last with this 32Wh battery?
The 32Wh / 4212mAh capacity is matched to the original specification, so real-world runtimes track the factory battery when new. Grade-A cells keep capacity stable over hundreds of charge cycles.
Is the battery safe and is it covered by a warranty?
Every battery is 100% brand new and passes multi-point safety testing (overcharge, over-discharge, over-temperature and short-circuit protection) before shipping. It is backed by a 1-year warranty and responsive after-sales support.
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.
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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.