I bought these power banks, so when we are fishing all day. Being outdoors, I have no access to electricity, and I prefer not to have to sit in my car to charge my phone. Since it was a 2 pack, I do not have to order 2 which means that I save money. They charge our phones in under 2 hours (full charge when phone is completely dead). They are much smaller than other power banks which I love. I can easily put them in my pocket or in our fishing bag.