How do you know when the HyperJuice Plug is fully charged? Shirley August 16, 2015 01:10 Updated Follow When the HyperJuice Plug is fully charged you will have 5 solid LED lights on. Tags: hyperjuice plug fully charged Related articles How long should I charge my new HyperJuice battery? English user manual for HyperJuice AC battery Does it work work the MacBook with Magsafe/Magsafe2 power connector? How do I know if the HyperJuice Micro/Mini is fully charged? When should it be recharged? How long does it take to charge the HyperJuice Plug? Comments 0 comments Please sign in to leave a comment.