I have received a portable phone charger as a gift last year as a Christmas present. I use to not think they were worth the money since it would just be an additional device I would need to remember to charge, but I found this gift to be very useful when going to class since with it I am able to do more work with my phone. Just using my phone during the day between classes would drain its battery in a hurry. This semester I am also using my phone more often during my job since my new job involves a lot of waiting. I have not used my bluetooth keyboard too often since my phone would often die before I got much work done, but with my new portable charger I no longer have to worry about that issue. This also means that I do not have to carry around my laptop as often. Therefore, I went from thinking these chargers were a waste of money to something I could not live without.