OVERVIEW: Super Power: Provides an enormous 40,000mAh battery capacity, enough to charge your devices for several days. 4-in-1 Fast Charging: With 2 USB-C and 2 USB-A ports, the portable charger delivers powerful and high-speed charging to up to 4 power-hungry devices at the same time. Trickle Charging Mode: Charge low-powered devices such as earphones or Bluetooth speakers without having to worry about damaging the battery. Activate trickle charging mode by pressing the power button twice....