Aspire 2920WTMi battery life

[Jalaj]

What is the battery life of Aspire 2920WTMi? If anyone knows and any more info on it would be helpful. Looking at purchasing one.

[ApPy10]

CPU: Intel Core 2 Duo T5450 1.66GHz 800MHz FSB 2MB L2 Cache
Hard Disk: 160GB
Memory: 1GB std., 2GB max. DDR2 667MHz SDRAM
OS: Genuine Windows Vista Home Premium
Chipset: Mobile Intel GM965 Express Chipset
Display: 12.1" WXGA high-brightness (200-nit), Acer CrystalBrite TFT LCD
Max. Resolution: 1280 x 800
Graphics: Intel Graphics Media Accelerator X3100 up to 358 MB of Intel Dynamic Video Memory Technology 4.0 8 MB of dedicated system memory, up to 350 MB of shared system memory
Communications: Intel PRO/Wireless 3945ABG (dual-band tri-mode 802.11a/b/g) Wi-Fi CERTIFIED network connection, supporting Acer SignalUp wireless technology, Bluetooth 2.0+EDR (Enhanced Data Rate), Gigabit Ethernet, Wake-on-LAN ready, 56K ITU V.92 with PTT approval11
Optical Drive: 8X DVD-Super Multi double-layer drive
Audio: Dolby9-certified sound system with two built-in stereo speakers, High-definition audio support, MS-Sound compatible, Acer PureZone technology with two built-in stereo microphones featuring beam forming, echo cancellation, and noise suppression technologies
WebCam: Integrated Acer Crystal Eye webcam
Dimensions: 11.97" x 8.78" x 1.26/1.65"
Weight: 2.04 Kg
Battery Life: 3.5 Hours

[Jalaj]

thank you appy10