A Lipo does not power on a linear curve. In my experience it’s logarithmic. I’ve seen charts that back this up. You can’t rely on the numbers as they are a guideline not absolute.
You have safe full power with lots of oomph when the battery is at its highest capacity where the bursts are getting full voltage. This lasts for about a third of your flight - for the Evo with an average time of about 21 minutes that’s going to be 7 minutes you can spend getting to your spot (7 minutes of flight will take you out of VLOS btw) and getting set to shoot. Then you’ve got another 7 to 10 minutes of safe work depending on shot speed and motor demand. A steady hover does not drain the battery as much unless it’s fighting wind. Once you see your battery getting towards 30 percent you should bring your Evo back to you and be ready to land before the low voltage warning and auto RTH kick in.
This will keep your batteries working longer and help delay the inevitable puffing and loss of captaincy that LiPo batteries are notoriously famous for. I know many pilots think that somehow the manufacturer should “fix” this but in the real world, wind conditions and weight relative to fuel/power are constantly shifting as do the calculations.
Remember battery powered flight is a negative because as time increases, power decreases. Unlike real liquid fuel, the weight actually starts to exceed lift power as time goes by until the battery becomes a dead weight brick and there is no elegant glide path down.