I am using the DigiOne with a battery powering my RPI3+. Its a LiIon Anker battery and seems to work very well. Whether it is better than a normal PSU I don't know as I have not made a direct comparison. I stopped using the S-Boosters because I found the "choked" the music, at least with my Caiman SEG. The SEG and my monoblocs now are all powered by 12 V LiPO4 batteries.
Cheers
Alastair
RPI4/PI2AES running PiCorePlayer/LMS-> AQ Carbon AES -> Topping D90 DAC-> Khozomo Passive Pre-Amp -> 4x Temple Audio Monoblocks powered by 2xLiFePO batteries->Van Damme Black Bi-Wired to B&W 804 Nautilus and Sommer Carbokab 225 Interconnects