BTI DL-E5440X6 10.8V 60Wh Li-Ion Battery for Dell Latitude E5440/E5540

The BTI DL-E5440X6 10.8V 60Wh Li-Ion Battery is a high-performance replacement power source engineered specifically for Dell Latitude E5440 and E5540 notebooks. Designed to deliver dependable, long-lasting energy, this battery keeps you productive whether you’re working from home, in the office, or on the road. With a robust 60Wh capacity, built-in safety protections, and a precise Dell-compatible fit, it’s the smart choice for extending your laptop’s runtime, reducing downtime, and maintaining peak performance when you need it most.

• Long-lasting 60Wh capacity for extended runtimes. This high-energy Li‑ion battery delivers more minutes of productivity per charge, helping you power through tasks, meetings, and creative sessions without constantly searching for an outlet. The 6‑cell design strikes a balance between weight and energy density, so you can carry less while getting more work done.
• 10.8V Li‑Ion chemistry with smart protection. Engineered for stable, reliable output, the 10.8‑volt configuration provides consistent power delivery while minimizing self-discharge. Integrated protection features guard against overcharge, short circuits, and thermal fluctuations to preserve both battery longevity and system safety.
• Direct-fit replacement for Dell Latitude E5440/E5540. Manufactured to exacting specifications, this BTI battery aligns with the original form factor, connector placement, and mounting points, ensuring a seamless, tool-free installation and a secure, flush fit in your laptop chassis.
• Reliability you can trust from BTI. Built to meet or exceed OEM performance, this replacement battery is tested for quality and compatibility with the Latitude series, so you enjoy dependable power, steady voltage, and consistent cycle life across daily usage—from light browsing to demanding software workloads.
• Convenient, practical power when you need it. Whether you’re coding late into the night, presenting to clients, or completing design work, this battery provides the dependable stamina you expect from a premium replacement. It’s ready to perform right out of the box and designed to minimize downtime and maximize productivity over its lifecycle.

Technical Details of BTI DL-E5440X6

• Model: BTI DL-E5440X6
• Voltage: 10.8V
• Capacity: 60Wh
• Chemistry: Lithium-ion (Li‑ion)
• Cell Configuration: 6‑cell
• Compatible Models: Dell Latitude E5440 and Dell Latitude E5540
• Part Numbers: 451-BBIE, 9TJ2J, LAP5441, WGCW6
• Replacement Type: Laptop battery (replacement for OEM Dell battery)

how to install BTI DL-E5440X6 Battery

• Prepare your workspace: Power down your Dell Latitude completely, unplug the charger, and remove any connected peripherals. Place the laptop face down on a clean, stable surface to access the battery bay.
• Access the battery compartment: Locate the removable battery bay cover on the underside of the notebook. If your model requires removal of the back panel, follow the device’s manual for safe access; use appropriate tools if needed and take care to avoid static discharge.
• Remove the old battery: Release the existing battery using the designated latch or release mechanism and gently slide it out from its bay. Handle the battery with care and keep it away from metal objects that could cause short circuits.
• Insert the BTI replacement: Align the BTI DL-E5440X6 with the battery contacts and slide it into the bay until it sits flush and the latch clicks into place. Ensure the connector is fully seated and the battery is securely seated within the chassis.
• Reassemble and verify: Reattach any covers you removed, reconnect the power adapter, and power on the laptop. The system should recognize the new battery; if prompted, allow the battery to calibrate with a full 100% charge before normal use.
• Initial charging and care: For optimal cycle life, charge to 100% before first use and avoid prolonged deep discharges. Use the laptop normally during the first few cycles to let the Battery Management System learn the new cell configuration.

Frequently asked questions

• Q: Is this battery compatible with Dell Latitude E5440 and E5540?
  A: Yes. The BTI DL-E5440X6 is specifically designed as a replacement battery for Dell Latitude E5440 and E5540 notebooks, matching their form factor, connectors, and power requirements.
• Q: What are the key specifications?
  A: The battery provides 10.8V and 60Wh of capacity in a 6‑cell Li‑ion configuration, delivering reliable, steady power for everyday productivity and longer work sessions.
• Q: How do I know this is a reliable replacement?
  A: BTI is known for producing replacement batteries that meet or exceed OEM specifications, with compatibility verified for the Latitude series to maintain performance and safety standards.
• Q: How should I install the battery?
  A: Installation steps include powering down the laptop, removing the old battery, inserting the BTI DL-E5440X6, securing it, and then verifying the system recognizes the new power source. Refer to the installation guide above for step-by-step details.
• Q: Are there safety features included?
  A: Yes. The battery is designed with protections against overcharge, short circuits, and thermal events to help protect your device and extend battery life during normal use.