It’s not a physics problem. Do you own an iPhone mini? I use one every day in a dual sim setup as a work + personal phone and have zero issues with battery life and a telephoto housing would make little difference to that, especially if we’re moving to an esim only future. Plus, I suspect we’re moving back to a dual lens configuration where the ultra-wide and the telephoto lenses replace the need for a default lens.It’s called physics. People already complained about the poor battery life, yet you want Apple to shrink the battery further to make room for a telephoto lens? The reality is, the form factor wasn’t appealing in 2020 and it won’t be in the future.