Heading to vacation this coming weekend, and I'm contemplating buying batteries for my a7 and a6000. I bought them both used, and have 4 used batteries. I swear if I set them down for 3 days and don't use them, they lose like 10-20% battery life. In one very mild walk-around shooting session (I shut off my camera between shots) I'll go from like 80-50% battery. Is this what others typically experience? If this is standard Sony battery life, then so be it. But if I am wondering if I should buy new ones -- however at $55+ per pop new, I don't want to spend the money unless I truly think there will be an improvement!