How much battery life can i get out of this notebook?

And also, do you think i should edit/change anything (current price is 2019 USD)


- Display: 15.4" WSXGA+ LCD with Super Glossy Surface (1680X1050)
- Processor: 45nm Intel® Core™ 2 Duo Processor P9600 / 6MB L2 Cache, 2.66GHz, 1066MHz FSB[+$165.00]
- Video & Graphics Card: Nvidia GeForce GTX 260M Graphics with 1GB DDR3 Video Memory
- Operating System: Genuine MS Windows® VISTA Home Premium 32/64-Bit Edition
- Memory: 4GB Dual Channel DDR3 SDRAM at 1066MHz - 2 X 2GB[+$50.00]
- Promotion Offer: Free copy of Crazy Machines 2+ PC Game Software- Game Bundle sponsored by nVIDIA
- Primary Hard Disk Drive: 320GB 7200rpm SATA 300 Hard Drive[+$45.00]
- Optical Drive: 8X DVD±R/RW/4X +DL Super-Multi Drive & Software
- Wireless Network Card: Intel Wi-Fi Link 5300AGN - 802.11A/B/G/N Wireless LAN Module
- Bluetooth: Internal Bluetooth V2.0 + EDR Module
- Primary Battery: Smart Li-ION Battery Pack
- TV-Tuner: TVT-6010, USB ATSC HDTV / ANALOG TV TUNER[+$85.00]
- Integrated Security Device: Fingerprint Reader
- Microsoft Office: Microsoft Office Ready with Free 60-Day Trial
- Warranty: Sager 1 Year Limited Parts and Labor Warranty with Three-Day Shipping Both Ways Paid
- Additional Battery Pack: BAT-8662, NP8662 Smart Li-ION Battery Pack[+$110.00]
- Carrying Bag: TSB212, Targus Sport Computer Backpack-Platimum/Black[+$65.00]

looks like a nice config you have there for the money. Only thing I might do myself is go up to a 500GB HD if it's available