BTI 451-BBLN-BTI 7.4V 38Wh Li-Polymer Battery for Dell Latitude E5250/E5450/E5550 (3550 Series)

This premium replacement battery is designed to restore your Dell Latitude notebook’s power with OEM-style performance and reliable, long-lasting charge. Built to fit multiple Latitude models, including E5250, E5450, E5550, and the 3550 series, this 2-cell Lithium Polymer battery delivers a steady, consistent output that helps you stay productive on the go. Whether you’re traveling, commuting, or working from a cafe, this BTI battery is engineered to meet the power demands of today’s mobile professionals. It replaces a broad range of SKUs and part numbers, making it a flexible option for several Latitude configurations while keeping a compact form factor that fits neatly in the original battery bay.

• Long-lasting runtime for busy days: With a 5100mAh capacity, this 2-cell lithium polymer battery provides dependable power to help you complete tasks, create content, and stay connected without frequent recharges.
• High-energy lithium polymer technology: The Li-Polymer chemistry supports a compact, efficient design with solid energy density, helping you get more minutes of use between charges while keeping a slim profile compatible with the Dell Latitude chassis.
• Consistent voltage and performance: Rated at 7.4V, this battery delivers stable power to your Latitude notebook, helping maintain consistent performance during intense workloads, multimedia editing, and long browsing sessions.
• Wide compatibility withLatitude models: Specifically designed to fit Dell Latitude E5250, E5450, E5550, and 3550 series laptops, and it substitutes for multiple original part numbers (including 451-BBLN, PF59Y, PF69Y, G5M10, 8V5GX, VMKXM, WYJC2, 0WYJC2N, and more), making it a versatile replacement option for many Dell configurations.
• Easy install with OEM-like fit: The battery is shaped to align precisely with the original bay and connector, enabling a straightforward replacement that minimizes the risk of fit issues or misalignment and supports a clean, secure installation.

Technical Details of BTI 451-BBLN-BTI 7.4V 38Wh Li-Polymer Battery

• Battery type: Lithium Polymer (Li-Polymer)
• Cells: 2
• Nominal voltage: 7.4V
• Capacity: 5100 mAh
• Energy: 38Wh
• Compatibility: Dell Latitude E5250, E5450, E5550, and 3550 series
• Replaces: 451-BBLN, 451-BBLK, PF59Y, PF69Y, G5M10, 8V5GX, VMKXM, WYJC2, 0WYJC2N, 451-BBLL, F5WW5, PF69Y, YM3TC
• Chemistry compliance: Meets standard safety and quality guidelines for notebook batteries
• Manufacturer: BTI
• Form factor: Replacement battery pack designed for the Latitude chassis

how to install BTI 451-BBLN-BTI 7.4V 38Wh Li-Polymer Battery

• Power down your Dell Latitude and unplug the charger. Place the laptop on a clean, flat surface and close the lid.
• Flip the notebook over and locate the back panel screws. Use the appropriate screwdriver to remove the screws and carefully lift the back cover to expose the battery bay.
• Carefully disconnect the old battery from its connector. If the connector is tight, gently wiggle while pulling straight out to avoid damaging the socket.
• Align the new BTI battery with the bay, ensuring the connector lines up with the motherboard socket. Seat the battery firmly into place so it sits flat and secure.
• Reconnect the battery connector to the motherboard, then replace the back cover and secure it with the screws you removed earlier. Ensure there are no loose components.
• Connect the charger and power on the device. Allow the battery to reach a full charge (ideally 100%) before first-time use and perform a full discharge/charge cycle a few times to calibrate the battery meter for accurate remaining-life readings.
• Monitor temperature during initial uses. If the device becomes unexpectedly warm or if you notice any abnormal behavior, power down and recheck all connections, ensuring the back cover is properly sealed to aid cooling.

Frequently asked questions

• Q: Is this battery compatible with my Dell Latitude model? A: Yes. It is designed to fit Dell Latitude E5250, E5450, E5550, and 3550 series notebooks and replaces multiple original part numbers such as 451-BBLN, PF59Y, PF69Y, and other listed SKUs.
• Q: What are the key specifications? A: The battery is a Lithium Polymer (Li-Polymer) pack with 2 cells, 7.4V nominal voltage, 5100mAh capacity, and 38Wh energy rating.
• Q: Is it an OEM replacement or a third-party option? A: It is a BTI replacement battery designed to match OEM form factor and compatibility for Dell Latitude devices.
• Q: How long will this battery last between charges? A: Runtime varies with usage, screen brightness, and workload. On typical day-to-day tasks, you can expect a reliable recharge interval similar to other 5100mAh, 7.4V Li-Polymer batteries of this class.
• Q: How should I maximize battery life and longevity? A: For best results, use the laptop on balanced power settings, avoid exposing the battery to extreme temperatures, perform occasional full-charge and calibration cycles, and store the battery with a partial charge if it will not be used for an extended period.
• Q: Is it safe to use this battery immediately after installation? A: Yes. After installation, connect to power and allow a full charge. Use the device normally once the battery has calibrated through initial discharge/charge cycles and the charging indicator shows proper charging activity.