I’m not an electrical engineer but batteries don’t give perfect output constantly so your three percent might have been correct. It’s an hard problem and if you

I’m not an electrical engineer but batteries don’t give perfect output constantly so your three percent might have been correct. It’s an hard problem and if you want it to be “it should always be able to go to zero” then they will just increase the margin of when to shut down and people will wonder where their battery life went.