Battery backup

Hello audiophile friends
I was wondering if is possible to use battery backup devices (used for computers etc) to power Dac in my system and maybe preamp too???
Or maybe there is a different device for that
Thank you
Happy Easter everyone
I have read 'computer battery backups' are not ideal for audio although I have never tried it. BUT take into consideration that for computers there are 2 types of battery backups. First is just that - a backup meaning you run off of wall power until power fails and then it switches to battery. The other is an on-line UPS meaning you always run off of the battery.

That being said there are 're-generators' made just for audio. 2 that come to mind are PS Audio and PurePower. I just got a PurePower 1050 and run my source - integrated and sub off of it. It lowered the noise floor for me and does not restrict dynamics or power. At a fairly loud level of listening I tripped the circuit breaker and listened for 25 min and the battery level dropped to 50%. I do not know at what point the PurePower shuts down (depleting the batteries to 0V will be the end of the batteries) so there should be a point where the unit shuts itself off to protect the batteries from totally discharging.
Currently using a Liebert UP tation regenerator on my complete A/V system except for amps and subs. Puts out a pure unwavering 120 vac and I must say, I'm VERY impressed with its abilities. Plus it also provides for battery backup by the nature of how it works. AC-Filtering-DC-battery-DC-AC
Spinaker01; I had Liebert unit a while back for my computer system and while it delivers great, pure power the fan inside was making too much noise.
What model do you have? Does it have a fan? If so, how did you deal with the noise?
Computer UPS systems are not good for audio components because most of them produce square wave AC when on battery backup, as opposed to low distortion sine waves normally present on the AC powerlines.

The square waves are highly distorted and have a lot of high frequency grabage you do not want being fed into your analog power amps and preamps. While your input transformers will filter some of this crap out, it may also cause them to run hot or make noise.

Also, because the equivalent RMS value of a square wave has a lower peak voltage, the voltage level of the rectified waveforms will be lower, resulting in a lower filtered voltage in your power amp or pre-amp. A true square wave will have only 70% of the peak voltage of a sine wave. Which means a power supply of 50V (on AC sinewave) will only be 35V with a square wave. This will create obvious operating problems in your amplifiers.

There are some products that produce true low distortion AC (like the afore mentioned PS Audio products), but brands like APC do not. Edit: APC may make true AC sinwave generators but they are for larger industrial applications and are very expensive and not suited for in home use.