Charge your mobile device quickly and efficiently on-the-go with the EFM® TREK OUTDOOR POWER BANK. Equipped with DST (Device Sensing Technology), the EFM Trek Outdoor Power Bank determines the power requirement of your device and optimises the output to suit so you get the fastest, most efficient charge possible. DST also protects your device from over-charging, prolonging the life of both the battery and device. The EFM Trek Outdoor Power Bank is packed with more power than ever and its durable construction make it the ideal portable charging companion for all the places you’ll go. Each Power Bank conveniently includes a 25cm USB to Micro-USB cable and handy carabiner connector.