Hiya yellow, I have the zeus and I do love it, but I also have 2 DAV's, and I think it is good to have the DAV's as well as the zeus, the zeus is a awesome battery, but you are stuck at 5volts, it is more powerful than the DAV, fast charging and pass
through but I still use DAV's at odd time for clearo's etc.
I think you made the right decision getting the DAV 1st, later on you can step up to the zeus
