Battery percentage

Separate widget, I'm afraid. I looked for the same thing and finally just gave up. Many do it, though.

 

They should add it back at least as an option =/

Lots of cool clock widget skins out there that display it. That's what I use.

 

No other stock Android versions have had this AFAIK. You'll either need to use a widget or find a ROM that features it. My Gnex has this with a custom ROM.

 

Just unlock it and install a custom ROM

 

I use gauge battery widget and like it. Small and unobtrusive. Free and a cheap paid version.

 

I downloaded an app that displays the % in the top bar. I don't remember which one did it for sure - maybe Go Power Master.