Dell 40WHR 3-Cell Laptop Battery, compatible with various Dell laptop models that require this specific power configuration. This lithium-ion battery provides reliable mobile energy with a capacity of 40 watt-hours and supports extended usage time between charging cycles. The 3-cell design offers a balanced ratio of runtime to weight, making it suitable for mobile computing needs. Manufactured by Dell to ensure compatibility and performance with Dell laptop systems. The battery features standard Dell power management technology for efficient energy use and battery health monitoring. With dimensions typically around 20.5 cm in length, 7.8 cm in width, and 1.2 cm in height, it maintains a slim profile that seamlessly fits into compatible laptop cases. Weighing approximately 220 grams, it adds minimal weight to portable systems. The operating temperature range of 0°C to 45°C ensures reliable performance under various environmental conditions. This replacement battery is designed to restore the original device performance for compatible Dell laptops. The V8XN3 part number allows for precise compatibility matching with specific Dell laptop models. For optimal battery performance and longevity, correct installation and initial charging cycle are recommended. Regular calibration through complete charge and discharge cycles helps maintain accurate battery status indication. This battery solution provides reliable power for business, educational, and personal computing applications where dependable mobile performance is essential.