I believe that iPhones have a reputation for better power management and therefore better (or at least more consistent) battery life, hence the iPhone mention.

I believe that iPhones have a reputation for better power management and therefore better (or at least more consistent) battery life, hence the iPhone mention. On a side note, because there are more of them, there are also more options for external battery cases, just as there were extended battery options for some of the more popular Android phones when removable batteries were standard.