Greetings I had an Anker battery case for my iPhone. It was great, however Apple decided not to support it after an update. Anker was good about replacing it which allowed me to have a power case for a few more iOS updates. I have since given up and use an external power bank. The first one I bought was a little known brand from The Source. It worked OK and was roughly the same size as an iPhone 6. The problem which I didn't think of at the time is that the USB ports are on the sides. This made it awkward when putting my iPhone and power bank into a belt pouch. Having the USB ports on the side made it difficult to plug in a USB cable and caused it to bend much more severely than I liked. I then found one that had the two USB ports on the top which works much better. Another option that I know nothing about is a power bank from Energrid Accessibility. I never heard of this company, but they do sent me updates from time to time. Whether or not they are an actual company or just some type of vaporware I cannot say. I must defer to someone else who might actually have used their products. According to their web site they have a power bank for $75.00 U. S. This is more than twice as much as I paid for power banks that have similar capacity. The tactile features along with audible or vibrating notifications are not worth the additional $40 to $50 U. S. for me. However who am I to judge? Here is the link to their site with product details. https://accessibility.energrid.us.com/products/energrid-vs150x-power-bank Vic Pereira Project Manager, Intra-Building Networks Real Property Projects | Networks and End-Users Branch Shared Services Canada | Government of Canada vic.pereira@ssc-spc.gc.ca | Tel: 204-781-5046 Gestionnaire de Projet, Réseau Intra-Immeubles Projets biens immobiliers | Direction générale des Réseaux et utilisateurs finaux Services partagés Canada | Gouvernement du Canada vic.pereira@ssc-spc.gc.ca | Tél: 204-781-5046