Pleas help powering a PC fan with 12V battery.

[clammy]

Hey guys,

First, thank you for taking the time out and reading this.

I am trying to power a 12V 0.18A 80mm pc case fan using a battery. The problem is that I don't know what battery would be suitable for prolonged running (5hrs a night/4 nights in a row for ex). I need something that is light and want to avoid one of those scooter 12V batteries. Looking for more of a NiMH battery pack setup. Would any of these work or do I need to go for bigger aH for prolonged use?

http://www.batteryspace.com/capacity200 ... packs.aspx

Thanks!