I run a dual Tekkeon mp3450 set at 19v and it will run the Sonsoax forever. never had it die on me so i don't know how long it will truly last but I ran it a full day on Jam Cruise without issue. I usually run one of these dual tekkeons to power 2 Sonosax devices simulataneously and after a typical 5 hr show the battery is down 1 bar/light at most.