BTI 66DWX-BTI Battery for Dell Latitude 7340/7440/7640

Power your Dell Latitude with uninterrupted productivity using the BTI 66DWX-BTI Battery. This compact, high-efficiency replacement is engineered for the Latitude 7340, 7440, and 7640 series, delivering dependable runtime in a lighter, smaller package. At 11.4V and 57Wh, the 3-cell Li-ion design packs substantial energy into a slim form factor, helping you squeeze more work into each charge without weighing down your laptop. Built with a proprietary battery size for enhanced reliability and optimal performance, this BTI battery is a smart upgrade for professionals, students, and travelers who demand mobility and endurance from their notebooks.

Smaller and lighter than many standard rechargeable batteries, the BTI 66DWX-BTI is engineered to preserve the Latitude’s sleek profile while boosting on-the-go power. The 3-cell configuration minimizes weight while preserving solid runtime, enabling longer sessions between charges and reducing the need for frequent top-ups during back-to-back meetings, flights, or study sessions. Whether you’re drafting reports at a coffee shop, presenting in a classroom, or working from a shared workspace, this battery helps you stay productive without the burden of a heavy pack.

Quality and safety are at the core of this BTI replacement. The BTI 66DWX-BTI Battery incorporates advanced safety features, including overcharge protection, short-circuit protection, and thermal safeguards. A robust battery management system continuously monitors voltage, current, and temperature to optimize performance, extend lifespan, and shield your laptop’s sensitive electronics from unexpected surges or heat spikes. With dependable protection and reliable power delivery, you can rely on your Latitude to perform when you need it most.

Designed for Dell Latitude models 7340, 7440, and 7640, this battery offers a precise, plug-and-play replacement that restores original battery life without compromising fit or safety. The proprietary size ensures a snug connection with the laptop’s power circuitry and a secure fit within the chassis, delivering consistent charging and power output. This BTI battery is an excellent option for professionals who travel frequently, students who log long study sessions, or anyone who relies on their Latitude for everyday tasks. It’s a cost-effective alternative to OEM batteries that delivers comparable performance and dependable power on demand.

Beyond compatibility, the BTI 66DWX-BTI Battery emphasizes durability and longevity. The 3-cell configuration, paired with top-grade cells and rigorous testing, supports stable performance across typical operating temperatures and everyday use. This means better heat management, steadier voltage delivery, and fewer fluctuations during heavy workloads. For those seeking a long-lasting replacement that won’t break the bank, this BTI battery provides a balanced combination of capacity, efficiency, and reliability that keeps pace with demanding schedules and busy days.

• Extended runtime with 57 Wh capacity and a compact 3-cell design, delivering dependable power for Dell Latitude 7340/7440/7640 without bulk or unnecessary weight.
• Lightweight and portable, reducing notebook carry weight and improving balance for comfortable all-day use on the go.
• Precise compatibility with Dell Latitude 7340, 7440, and 7640 due to proprietary sizing, ensuring a snug fit and reliable electrical contact.
• Advanced safety and protection: integrated battery management system with overcharge, short-circuit, and thermal protections to safeguard your device and data.
• Easy replacement with plug-and-play design; no memory effect, consistent charging cycles, and durable construction for daily use.

Technical Details of BTI 66DWX-BTI Battery

• Model: BTI 66DWX-BTI Battery
• Battery Type: Lithium-Ion (Li-ion), 3-Cell
• Voltage: 11.4V
• Capacity: 57 Wh
• Compatibility: Dell Latitude 7340, 7440, 7640
• Replacement For: Proprietary Dell Latitude battery size for 7340/7440/7640 series
• Chemistry: Li-ion

How to install BTI 66DWX-BTI Battery

• Power down your Dell Latitude and unplug from any charger or peripheral devices.
• Remove the back cover to access the internal battery compartment, following your laptop’s service manual or standard teardown steps.
• Carefully disconnect the old battery connector and lift the old unit from its cavity.
• Align the BTI 66DWX-BTI Battery with the chassis guides and connect the power connector securely.
• Place the battery into its slot, secure it with the appropriate screws, and reattach the back cover.
• Plug in the charger and begin with a full 100% recharge. Allow the battery to complete a full cycle to calibrate for accurate power reporting and optimal performance.

Frequently asked questions

• Q: Is the BTI 66DWX-BTI Battery a compatible replacement for my Latitude 7340/7440/7640? A: Yes. It is specifically designed to fit the Dell Latitude models 7340, 7440, and 7640 with the laptop’s proprietary battery size, delivering a reliable replacement that mirrors OEM behavior.
• Q: What kind of runtime can I expect? A: Real-world runtime depends on usage, screen brightness, and tasks. With typical productivity work, you can expect several hours of use between charges; heavy workloads may reduce runtime, while light tasks can extend it toward the upper end of the battery’s capacity range (up to and around 8–12 hours under favorable conditions).
• Q: Are safety features included? A: Yes. The BTI 66DWX-BTI Battery includes built-in protection circuits and a battery management system that guards against overcharge, short circuits, and overheating, helping protect both the battery and your Dell Latitude.
• Q: How does installation affect warranty? A: Installation should follow your device’s service guidelines. If you perform the replacement yourself, verify any warranty terms from Dell or your retailer, as improper handling could affect coverage. Always handle components with care and static-free precautions.