The sad truth is phones and tablets are getting more and more hungry from a power point of view, and their capacity seems to get less, alarmingly quickly. My month old iPhone tells me its battery now only holds 96% of the charge it had when new!!
So a good power bank is essential. This will charge my iPhone around 3 times from empty and when charging via cable is pretty quick. Wireless charging is always less efficient, but that is the trade off for convenience.
It is pretty neat that I can sit my phone on Top charging wirelessly and charge another device at the same time via the cable.
I’m really pleased with this powerbank, for me it is the perfect compromise between size and capacity. Fully recommended.