Instruction: Using the product's title, description, features, price, and brand, identify and retrieve the values associated with a specified set of target attributes. Output the extracted values along with their respective sources (e.g., title or feature) indicating where each value was found.

Input:
Product title: Dell Latitude 3440 Business Laptop: 14" (1600x900) Core i3-4030U 500GB 2GB DVD-RW BlueTooth Webcam Windows 7 Professinal downgradable to Windows 8 Pro
Product description: This reliable, affordable, durable laptop is an All-Purpose machine and fits a wide variety of needs. Perfect to handle most office or school-related tasks. This laptop's screen has decent picture quality, and therefore should be good for entertainment. Processor & Memory: Intel Core i3-4030U 1.9GHz Processor 2GB DDR3L 1 DIMM System Memory Drives: 500GB 5400RPM Hardrive Operating System: Microsoft Windows 7 Pro downgradable to 8.1 Professional Graphics & Video: 14" WLED (1600x900) Anti-Glare LCD Display Intel Integrated HD Graphics 4400 Webcam Communications: 10/100/1000 Gigabit Ethernet Wireless N Bluetooth 4.0 Audio: High Quality Speaker Keyboard: Keyboard and touchpad with Dell Latitude durability and sleek design Ports & Optical Storage Device: 1 x VGA 3 x USB 3.0 1 x LAN Ethernet 1 x Headphone/microphone combo jack 1 x DVD - RW Power Supply: 4-cell Lithium-Ion Battery Up to 5 hours of battery life Additional Information: Dimensions: 13.62" x 9.65" x 0.98" Approximate Weight: 4.6lbs
Product feature: 14.0 Inch HD+ (1600x900) Anti-Glare WLED-backlit with Intel Integrated HD Graphics 4400, Intel Core i3-4030U (Dual Core, 3M Cache, 1.90 GHz), 2GB DDR3L Memory, 500GB Hardrive with built-in DVD Drive, Window 7 Professional downgradable to Windows 8 Professional
Product brand: Dell
Target attributes: Battery Life
Answer: attribute: battery life
value: 5 hours
source: product description