I have a few different packs. All Anker. I have the slim 5000mAh which fits perfectly in my pocket and is extremely friendly to use. I then have a 10,000mAh and 13,000mAh. Both have quick charging and two USB ports. I mainly use those while traveling. I highly recommend the slim pack for daily usage. I have a 6" lightning cable with it so there isn't excess cable when holding the pack in my hand.