How long does it take to fully charge my scale? Acaia Support September 25, 2017 23:25 Updated Follow It takes 1-2 hours to fully charge the battery. Related articles How do I find out the battery level of my scale? How can I tell that my scale is charging? How do I charge my scale? How long will the battery last after it’s been fully charged? How to update your scale's firmware Comments 0 comments Article is closed for comments.