As a busy person that I am,a device that can keep up with me is what I define my need.and that why battery life is so important.A device that can last all day is the most important for me.
I do start my day very early,checking messages, online meetings,surfing the internet,working on my mobile phone.So I just need a device that won't run out of power midway through,with a long lasting battery life,i can be able to work at ease,and not be in haste due to that the phone might go off anytime,would be able to stay connected 24/7 with/clients,I would be able to take my time in reviewing things,I love music when working,listening to music while working helps me greatly,that would be possibe if the shelf life of the battery is much.
Having a device with at least 12 hours of battery life,would be the best.
You won't need worry for the next few hours of power outage, also if need be ro travel, you will be sure you have a device that could sustain you for hours on the road.
Having devices with longer battery life to me is the best.Camera is good and all,but what if the phone went off while taking pictures,i believe a device with good battery life would also have normal/good camera capturings,size is important too,but I would still go for longer battery life.
I could consider its Processor efficiencies,usage,resolutions, size and allz,depending on the device,but to me its most importantly about the battery life.
A good battery helps my personal life,I can play games for long,watch movies for hours,explore the internet with ease,and still be confident of attending meetings later,not scared of the battery going off.
You would get a powerbank,what would you consider when buying or getrin3 it,the battery life of course,a phone,the battery life,as you won't want to keep charging it every single minute.
For any device,i belive battery life is crucial.It helps stay connected and available always.
Thanks for taking your time to read through