Yup, that's pretty accurate. However, if you're interested and want to dabble, there are two Android phones that won't send you falling down that battery rabbit hole again - the Pixel XL and the Moto Z Force (and Moto Z Play from what I've heard). Having owned the Pixel XL, Z Force and 7 Plus, I can attest that the battery life is actually better on those two Android models then it is on the 7 Plus. (Of course the caveat being for how I use my phones.) No more battery status apps, Greenify, etc. to find out what's draining the battery. Will NEVER use a branded Android phone from Sammy or LG again. Battery life is atrocious on those.