Is this massive capacity battery going to be more of a gimmick than anything else? Only time will be able to tell, but on paper, 5,000 mAh would be roughly the equivalent of 45 days of standby time, or 4 days of regular use, at least according to what the engineers over at BLU have calculated. For a smartphone to last beyond a couple of days in this day and age under regular use is phenomenal – unheard of, practically, although back in the days where featurephones and Nokia ruled the roost, it would be nuts if the handset could not last a single day – some of us even got up to 5 days’ worth of regular usage on a full battery charge. [Press Release]