I considered its purchase for a long time as the cost was more than I could afford at the time. When I took delivery I was unhappy with the weight, it was far heftier than I expected. Sadly on the very next release, just a short while later, Swytch came out with the mobile phone sized/weight power bank. It was too late by then for me. I tried the heavier power source twice in total and haven’t used it since due to the weight. I was given the chance to buy the newer model but I was out of money by then. I feel it was a waste for me because I had wanted the convenience of the lighter/smaller model