My brother has an Elite somewhere in the office. While the 11 hours is probably with screen on low and no WiFi it may not be hard to get there especially if you pop in a SSD and a new battery.
Old batteries are double bad since they strain the charger and motherboard. If you want to save this machine, new battery is very important.
I got this old Elitebook 2570p from 2012. But the battery only lasts for 90 minutes.
In reviews from back then it was reported the 9-cell battery was lasting nearly 11 hours.
Is it so easy that I will get the same result today, or will my computer have aged in other ways that can affect the battery life?

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