Just FYI - Your 2012 MacBook Pro was originally rated with a battery life of "up to 7 hours". If you are getting 5 hours out of it then that appears to be OK for normal use. You are always going to be around 4 - 7 hours in practical and realistic use.
Definition of a "Cycle" for a battery - One cycle is equivalent to one FULL charge of the battery from 0% - 100%. For example if you charge your MacBook Pro's battery from 75% - 100% then that will take 4 charges to make one complete 100% charging cycle. Your 2012 MacBook Pro's battery is rated for Maximum 1000 cycles. If you install a new battery then the charging cycle count starts again from 0.
Some third party battery manufacturers claim that you may get 50% more use than the original battery. Be careful about those claims.
Here is some more information on ➔ Your Mac notebook battery.
Axel F.