Asus C21N1509 Battery for VivoBook X556U
Original price was: $111.99.$55.99Current price is: $55.99.
New replacement battery for Asus laptops using the C21N1509 part number.
- 🔋 Voltage: 7.6V · Capacity: 38.0Wh / 5000mAh · Type: 4-Cell Li-ion
- 🔄 Replaces: C21N1509, C21PQ9H, C21N1519
- 💻 Fits: Asus ASUS VivoBook X556U
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This high-capacity C21N1509 replacement battery fits select Asus ASUS VivoBook X556U laptops as an equivalent direct replacement. The C21N1509 serves as a reliable power solution for users experiencing reduced battery performance in their portable computers. This battery maintains full compatibility with systems that originally used part numbers C21PQ9H or C21N1519, ensuring proper fitment and electrical specifications. Whether your laptop currently uses the primary C21N1509 designation or alternate numbering like C21PQ9H, this replacement delivers the same power output and physical dimensions as the factory-installed component. The standardized connector design allows for straightforward installation in compatible ASUS VivoBook X556U series notebooks without modification or special tools.
This direct-fit C21N1509 operates at the correct voltage of 7.6 volts and provides 38.0 watt-hours of energy capacity through its 5000mAh rating. The 4-cell lithium-ion configuration uses Samsung cells to deliver reliable power distribution throughout the battery pack. Each cell maintains consistent voltage output while the integrated protection circuitry prevents overcharging and thermal issues during normal operation.
Under typical usage conditions, this C21N1509 replacement provides an estimated 3 to 5 hours of runtime depending on system configuration and workload demands. This replacement is the correct fit when the original battery reaches the end of its useful life. The lithium-ion chemistry ensures consistent performance across hundreds of charge cycles while maintaining the original power specifications.
Technical Specifications
| Voltage | 7.6V |
| Capacity | 38.0Wh / 5000mAh |
| Cells | 4-cell Li-ion |
| Part Number | C21N1509 |
| Brand | Asus Compatible |
Compatible Part Numbers
Compatible Laptop Models
Compatible with the models, series, and devices listed above; however, this is
not a complete compatibility list, and additional unlisted models may also be
supported. If your device is not shown, please email us at cs@usabatteries.com
for compatibility confirmation.
| Voltage | 7.6V |
|---|---|
| Brand | Asus Compatible |
| Capacity | 38.0Wh / 5000mAh |
| Part Number | C21N1509 |
At USA Batteries, we are committed to providing fast, free, and reliable shipping on every order. Below, you’ll find detailed information about our shipping process, delivery timelines, carriers, and what to do if your order experiences an issue.
🚚 What is the cost of shipping?
Shipping is completely free on all orders — no minimum purchase requirements, no hidden fees, and no surprise charges at checkout. We believe in transparent pricing so you can shop with confidence.
📬 Which shipping carriers do we use?
Most orders are shipped via USPS (United States Postal Service), which provides fast and affordable nationwide delivery. For large, heavy, or bulk orders, we may use FedEx or UPS to ensure safe and efficient handling.
Please Note: Some oversized products or wholesale shipments may require alternative carriers based on size, weight, or destination.
⏱️ How long does shipping take?
- Standard USPS Delivery: Most items arrive within 3–5 business days after leaving our warehouse.
- Order Processing: Orders are typically processed and shipped within 24 business hours of purchase.
- Delays: Shipping times may be longer during weekends, public holidays, or severe weather conditions.
If your order is time-sensitive, please contact us before purchasing, and we’ll do our best to assist.
⚡ Do you offer expedited shipping?
Currently, we do not offer paid expedited shipping options. However, many of our USPS shipments use Priority Mail, which generally arrives within 2–3 business days for most U.S. locations.
If you need a faster delivery option, reach out to us at cs@usabatteries.com, and we’ll check if a special arrangement can be made.
🌎 Do you ship internationally?
At this time, we only ship within the United States. We do not offer international delivery options.
📮 Can you deliver to PO Boxes?
Yes! We gladly deliver to PO Boxes, as USPS handles most of our shipments.
If your order requires FedEx or UPS (usually for larger packages), we may contact you for a physical street address.
🔍 How can I track my order?
You will receive an email with a tracking number as soon as your order ships.
You can also check your order status anytime on our Track Your Order page.
📦 Lost or Missing Packages
If your tracking number shows “Delivered” but you haven’t received your package:
- Check around your home — porch, mailbox, garage, or any safe drop-off spots.
- Ask neighbors or household members in case someone accepted the package.
- Wait 24 hours — USPS sometimes scans items as delivered before arrival.
If your package is still missing after these steps:
- Contact your local USPS office. USPS can provide GPS delivery confirmation to determine where your package was left.
- Contact us at cs@usabatteries.com or via Live Chat. We will assist you in opening an investigation and help retrieve GPS scan data if necessary.
Insurance Claims: All USPS shipments are insured. Any claims for lost or damaged packages must be filed with USPS. We will guide you through the process to ensure a resolution.
✅ Our Commitment
Your satisfaction is our priority. If you experience any shipping issues, we will work closely with USPS or the relevant carrier to resolve the situation promptly and ensure your order reaches you safely.
The USABatteries.com Guarantee
Your satisfaction is our priority. Every battery from USABatteries.com is rigorously tested and backed by a comprehensive 1-Year Warranty. We are so confident in our quality that we offer a Risk-Free 30-Day Money-Back Guarantee: if you aren't completely happy within the first month, we will cover the return shipping costs ourselves. Quality power, zero risk.
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