Also for craft projects with Raspberry Pi and actually all other 5V devices, the battery has always done his job.
I did not really pay attention as long but the battery is sufficient to use a charge as a power user I have my phone (Samsung Galaxy S5) and tablet (Samsung Galaxy Tab 4.0) several times charged with a charge.
Thanks to the high output amps need my devices and virtually all other smartphone / phablet / tablet and the 2.1 or 2.4 amperes were guaranteed.
The Raspberry Pi could also run several hours.
If you have a bag here then do not mind the size and weight.
The flashlight is turned on only a 1cm by 0.5 cm large button on the side (see photo) what happened only in about 1 out of 100 cases with me.
The performance is even after the 3 months that I already own the battery and several hours each day use the same as on the first day.
Since I bought the anchor battery as my first anchor product I am enthusiastic about the company. The packaging is always very affectionate with super instruction and information (see photo). Other products have arrived more quickly, undamaged and functional. Top!
So I can only recommend the battery. ^^