Mid 2012 Macbook Pro battery and MacOS

Soldato
Joined
18 Oct 2002
Posts
10,869
Location
Bristol
My old MBP battery is on 1355 cycles and still works okay, around 3 hours of light use which is fine as it never leaves the house these days. However, it looks like it's swelling slightly, the front left corner of the case has expanded about 1mm below the little button and LEDs showing charge level.

What are my options for replacing the battery? The local Stromfront store? eBay 3rd party?


Secondly, I'm still running El Capitan (!), am I right in thinking Catalina is the most recent (last) supported version? Is that the best option for this machine with 8GB 1600MHz DDR3, 2.3GHz i7?
 
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