I have an old school pair of ecocharge batteries that were originally used to power my v3 via 12v connector and sony m1 via it's 4.7v output. I'm looking to purchase a tascam dr-07 or dr-1 and hoping that the 4.7v output of the battery will power the unit. Looking at the specs of the power supply that can be used, says it provides 5v. Will my batts not be able to power those units?