How long will it take to charge my PRO rechargeable device? 12 March 2021 10:44 Updated It will take approximately 3 hours to charge your blu PRO rechargeable device. For further information click here. Related articles How do I know my blu PRO rechargeable device is charging and/or is fully charged? Why should I prime my blu PRO Kit Clearomiser and how do I do it? How long will a fully filled clearomiser last before I need to refill it? How do I know when I need to charge my blu PRO rechargeable device? How do I fill up the blu PRO Kit Clearomiser with e-liquid?