Benchmarking software Office productivity usage battery runtime benchmarking software

Not sure if this is the best forum for this question.

I am looking to evaluate a bunch of different laptops for battery runtime with a focus on office productivity usage.

Particularly I am after a benchmark that will simulate general office usage (working on documents, web browsing, very light multimedia etc) that will continue to run until the battery runs flat.

A “high score” is not important but rather how long a laptop can sustain an office productivity use is what is import.

A quick look around and PCMark 10 appears that it will fit the bill but wonder if there are any other options worth checking out?