That distortion, while sweet, is very short lived. I have two Signatures, a Europa, and several Series basses. The batteries in the non Series basses last 9-12 months with pretty much daily use. The LED batteries typically go long before the preamp ones. It’s not that difficult to date when you replace the batteries and keep the notes in your case. As far as Series basses go, just use the DS5 and you’ll never have to worry.