Lenovo Battery for ThinkPad T440P T540P L540 L540P W540 W541
Original price was: $119.99.$59.99Current price is: $59.99.
New Lenovo 45N1144 replacement battery, built for compatible notebooks.
- 🔋 Voltage: 10.8V · Capacity: 57.0Wh / 5278mAh · Type: 9-Cell Li-ion
- 🔄 Replaces: 45N1144, 45N1145, 45N1147
- 💻 Fits: Lenovo ThinkPad T 440P, ThinkPad T 540P, ThinkPad L 540P
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This high-capacity 45N1144 replacement battery fits select Lenovo ThinkPad T 440P laptops as an equivalent direct replacement. The 45N1144 delivers reliable power for ThinkPad T 440P, ThinkPad T 540P, ThinkPad L 540P, ThinkPad L540, ThinkPad W540, and ThinkPad W541 laptop models. This replacement unit is compatible with multiple part numbers including 45N1145, 45N1147, 45N1148, and other cross-referenced numbers, making it a versatile solution for various ThinkPad configurations. The battery provides seamless integration with your existing laptop system while maintaining the performance standards expected from Lenovo ThinkPad portable computers.
This direct-fit 45N1144 operates at the correct voltage of 10.8V and provides substantial 57.0Wh capacity through its 9-cell lithium-ion configuration. The battery utilizes Samsung cells engineered for reliable performance and longevity in demanding mobile computing environments. With 5278mAh capacity, this replacement delivers the power density needed for extended productivity sessions while maintaining the slim profile required for ThinkPad portability.
Users can expect approximately 5-7 hours of typical runtime from this 45N1144 replacement, depending on usage patterns and system configuration. Choose this replacement battery to extend the working life of your laptop. This battery solution enables continued mobile productivity for business professionals and students who rely on their ThinkPad systems for daily computing tasks.
Technical Specifications
| Voltage | 10.8V |
| Capacity | 57.0Wh / 5278mAh |
| Cells | 9-cell Li-ion |
| Part Number | 45N1144 |
| Brand | Lenovo Compatible |
Key Features
- High-capacity 57.0Wh 9-cell design for extended runtime
- Direct-fit replacement matching original voltage and capacity
- Premium lithium-ion cells for consistent performance
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 | 10.8V |
|---|---|
| Brand | Lenovo Compatible |
| Capacity | 57.0Wh / 5278mAh |
| Part Number | 45N1144 |
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.
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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.
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At this time, we only ship within the United States. We do not offer international delivery options.
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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.
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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.
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✅ 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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