Log files. They're there for a reason -- to keep track of what goes on behind the velvet curtain of your operating system. When things go wrong, entries are added to those log files, so you can view ...
You can customize the macOS Console's log window to change the way it behaves. Here's how to adjust it for your needs. macOS's Console app is a utility that allows you to view system-wide logs, crash ...
It seems to happen with all devices: you notice you don't get as much charge as you used to, and your iPad starts dying at inopportune times. Maybe it powers off when you still have 20% left, or just ...