My first three Solo batteries got to a point I was getting less than 10 minute flight time and below 25% the voltage dropped rapidly so I gave them away. I'm sure with the ACRO, speed tests and heat here in Vegas my batteries wore out quicker than normal. With the recent price drop on batteries I purchased 4 spares as well as two BB combos with spare batteries, so I have a lot of batteries now.
My flight times are now about 15 minutes with a new battery and 11" APC props, even at altitude. Funny how much crap Solo gets; I've had this Solo about two years and it's still plugging away. I purchased two spare Solo's but have yet to take them out of the box.
During the time I have had this single Solo my P3P wore out and fell apart, my P4 isn't doing so well, even my H has been back to Yuneec; so my Solo is my backup drone but see's more flight time than the others. Here the same Solo in ACRO over a year ago, then a month ago flying backup since the H is in the shop and DJI GO sucks.