THUNDER 5000 is the smallest portable charger ever with the best capacity-to-size ratio: the latest generation 21700 cylindrical cells can store a greater energy capacity in extremely compact volumes. THUNDER 5000 features a 12W USB-C port and a 12W USB port. It is ideal for charging all smartphones on the go. The design is optimized for performance: the non-slip coating and soft-touch material provide a solid grip and pleasant feel.