I am looking for where to find my specific computer hardware spec's, including my battery. I have a 2009-10 macbook pro and its needing a new battery. So, I need to find the battery size and make sure I get the right one. Using E OS, Juno 5.0, is there a page I can bring up, like a Spec Page? I know OS X has it.
You should be able to get some additional information about the battery in your system with the following command in the terminal:
upower -i /org/freedesktop/UPower/devices/battery_BAT0
However, you may be better using something like iFixit's "Identify my Mac" page to get the exact model, and it's also a fairly reputable place to buy replacement batteries from.