Dell 991XP Battery for Inspiron 15 5551
Original price was: $123.99.$61.99Current price is: $61.99.
Dell 991XP direct replacement battery for compatible models.
- 🔋 Capacity: 40.0Wh / 2600mAh · Type: 4-Cell Li-ion
- 🔄 Replaces: 991XP, M5Y1K, MSY1K
- 💻 Fits: Dell Inspiron 15 5551, Inspiron 5555, Inspiron 5558
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Designed as a direct-fit replacement, this new Dell 991XP battery powers select Inspiron 15 5551 laptops with the correct voltage and capacity. This 991XP replacement battery is compatible with multiple Inspiron models including the Inspiron 15 5551, Inspiron 5555, Inspiron 5558, Inspiron 5559, Inspiron 5755, Inspiron 3451, Inspiron 3458, Inspiron 3551, Dell Inspiron 15R, and Dell Inspiron 15. The battery also replaces several part numbers such as M5Y1K, GXVJ3, HD4J0, and other compatible variants. Whether you need to replace an old battery or want a backup power source, this 991XP offers reliable performance for your Dell laptop.
This equivalent replacement features premium lithium-ion cells configured in a 4-cell design with 40.0Wh capacity and 2600mAh rating. The 991XP battery delivers the correct voltage required by your Dell Inspiron laptop while maintaining the same form factor as the original battery. Built with quality cells and advanced chemistry, this direct-fit replacement provides dependable power for daily computing tasks and mobile productivity.
With an estimated runtime of 3-5 hours under typical usage conditions, this replacement battery supports extended work sessions and entertainment activities. Use this replacement battery to restore the full runtime of your laptop. The 991XP battery enables you to work untethered from power outlets, making it ideal for students, professionals, and anyone who needs reliable portable computing power throughout their day.
Technical Specifications
| Capacity | 40.0Wh / 2600mAh |
| Cells | 4-cell Li-ion |
| Part Number | 991XP |
| Brand | Dell 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.
| Brand | Dell Compatible |
|---|---|
| Capacity | 40.0Wh / 2600mAh |
| Part Number | 991XP |
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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