Instruction: Extract the value of the target attribute from the given product information and output it along with the corresponding source.

Input:
Product title: Lenovo ThinkPad SL410 Intel Core 2 Duo 2.1GHz 4GB RAM 500GB Hard Drive 14" HD LCD / 2.0MP web cam Windows 7 Professional (Black)
Product description: Supported flash memory cards: xD-Picture Card , SD Memory Card , Memory Stick , MultiMediaCard , xD-Picture Card Type H , Memory Stick Pro , SDHC Memory Card. Interfaces: 1.0 x eSATA / Hi-Speed USB - Output - RJ-45 , 3.0 x Network - Ethernet 10Base-T/100Base-TX/1000Base-T - Mini-phone stereo 3.5 mm , 1.0 x Audio / video - Input - 19 pin HDMI Type A , 1.0 x Headphones - VGA - 4 pin USB Type A , 1.0 x Display / video - HDMI - 15 pin HD D-Sub (HD-15) , 1.0 x Hi-Speed USB - 11 pin USB/eSATA , 1.0 x Microphone - Mini-phone 3.5 mm.
Product feature: Intel Core2 Duo Processor T6570 (2M Cache, 2.10 GHz, 800 MHz FSB), 4.0 GB RAM (Installed) DDR3 SDRAM - 1066.0 MHz / 8.0 GB (max), 500GB Hard Drive; Integrated DVD+/-RW; 2.0MP Web Cam; 14" TFT Screen, Intel GMA 4500MHD Dynamic Video Memory Technology 5.0; Spill-resistant keyboard , Illuminated buttons , Multi-touch touchpad, Wireless LAN; Built-in WiFi; Stereo speakers; 6 Cell Battery
Product brand: Lenovo
Target attributes: Battery Life
Answer: attribute: battery life
value: None
source: None