For the Lifebar 10 it can take up to 10 hours or over night for a full charge with a 1A output charger
For the Lifebar 5 it can take up to 5-6 hours with a 1A output charger
For the Lifebar 3 it can take up to 3-4 hours with a 1A output charger
**Remember that this varies, depending how much battery percentage you have left and output amps on your charger, the lower the slower**