The Chaheati USB (5V) Powerbank was designed for the Chaheati (5V) USB Heated Chair. However, this power bank has more uses than just heating a chairwith USB output, it can also charge any phone, tablet or portable device you desire. The rechargeable Powerbank provides 4 hours of heat on High, 6 hours on Medium and 8 hours on Low. Now theres no reason to pack it in early when the weather turns cool outside. Just grab some heat with Chaheati. Need some heat (or a charge) have a seat and choose Chaheati for your charging or heating needs.