Battery Life

I think this is the best forum
but how long is my battery supposed to last for before my ASUS laptop automaticly shuts down
because of low battery?


Battery Imformation and Laptop Imfomation is listed below:


Battery Imformation:
ASUS Li-ion Battery Pack A32-K53
Rating: +10.8V 5200mAh 56Wh

System Imformation:
Windows 7 Ultimate
System
Manufacturer
ASUSTeK Computer Inc.
Model
K43BR
Total amount of system memory
4.00 GB RAM
System type
64
-
bit operating system
Number of processor cores
2
Storage
Total size of hard disk(s)
466 GB
Disk partition (C:)
31 GB Free (60 GB Total)
Disk partition (D:)
130 GB Free (136 GB Total)
Disk partition (E:)
135 GB Free (135 GB Total)
Disk partition (F:)
132 GB Free (135 GB Total)
Media drive (G:)
CD/DVD
Graphics
Display adapter type
AMD Radeon HD 6400M Series
Total available graphics memory
2613 MB
Dedicated graphics memory
1024 MB
Dedicated system memory
0 MB
Shared system memory
1589 MB
Display adapter driver version
13.152.0.0
Primary monitor resolution
1366x768
DirectX version
DirectX 10
Network
Network Adapter
Realtek PCIe GBE Family Controller
Network Adapter
Qualcomm Atheros AR9485 Wireless Network Adapter