So your sure that you definitly need an huge battery to power an computer? Computer as in an Celeron 1.2/1.3GHz, Stock generic motherboard, FX5200...You might a lower price for one somewhere else if you shop around some. Usually by searching for a specific make and model or type you'll come across a shopping site with a few links comparing prices seen at different vendors. But that product line seen there is a start for what you are looking for.
Why do you always seem offline?saw one thing about a 60w dc type supply you apparently mounted in a pci slot for powering a desktop from an external source. But only 60w? I would be skeptical with something like that working out well.
Spmething like a car or tractor battery would be obviously oiut since you can't carry the rest of an auto along with you for the alternator in order to recharge the car battery!
There are some ac to dc adapters that see an auto type 12v plug for using something like a car stereo on ac. But those would also serious lack the needed amperage for a desktop. Something like the APC product line for batter backups is still the best idea to look into there. Those are designed for pc application when ac power is out. Those are simply recharged later after the short term use they offer.
Snap! With The_Other_One's help, he figured:You still have to recharge any battery power after so long. For a mobile cpu then you are looking at a mini desktop with a laptop type board installed into it. Those are intended for running off of the standard lithium batteries you would see in a laptop or notebook portable unit. Those would be limited to the amount of drives/devices you could add in however.