Some of these shortcomings can be overcome,
such as by buying a battery
pack for convenience (in order to charge the battery during the day, and to then use the battery
pack to charge other
devices at night), but some of the weak points can make the products an almost complete waste of money,
such as ones with a solar panel or cells that are too
small to be practical for everything except adding a little boost to a
device's battery (which, to be fair, can be very useful indeed if your
device's battery is completely flat).
Your review says «This battery
pack can provide more power, for longer, than our
smaller mobile -
device pick, extending the battery life on USB - C laptops
such as the most recent MacBook Pro models, and the Dell XPS 13.»