How long will it take to charge my PRO rechargeable device? 12 March 2020 11:01 It will take approximately 3 hours to charge your blu PRO rechargeable device. 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 fill up the blu PRO Kit Clearomiser with e-liquid?