4. september 2024 How long does it take to charge the Extra Battery? Share on Facebook Opens in a new window. Tweet on Twitter Opens in a new window. Pin on Pinterest Opens in a new window. Charging the Extra Battery to 80% takes approximately 1.5 hours, and fully charging it takes about 2.5 hours when connected to the Ark PRO. Charging separately with the adapter takes about 5 hours. Back to blog