What I found was that Lowes stores stopped carrying the 80v in stores when they started offering the Ego. My 80v battery died and it actually made more sense to buy a new 40v device with battery (and a spare battery on sale) than it did to buy a new 80v battery. I was actually able to buy a display model of the Kobalt string trimmer that supports trimmer plus heads for next to nothing (it was missing a part I had at home and was scratched up). That was great since they are also phasing out trimmer plus support trying to sell indivdual devices. I couldn't swith to Ego because they wouldn't work with my trimmer plus heads either.
Needless to say I had an interesting time after both my 80v battery and my Ego (blower) battery died about a week apart.