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.
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.