How long does a Power Bank take to charge?
Update Time:2014-06-07

This depend on two things, the capacity of the batteries and the rating of the charging circuit within the power bank. This could be from 2000mA on some small capacity products up to 2A max for larger units (max USB output)

In general small units may take 3-4 hours and high capacity ones up to 10 to 12 hours.