How long do the batteries last?

Large Battery (30,000 mAh capacity)

Powering 3 device terminals, the battery lasts a minimum of 7-8 hours. When powering a single device terminal, the battery can last up to 18-24 hours.  

Small Battery (3,300 mAh capacity)

Note: battery life varies depending on how many taps a device terminal receives and if it is being used in colder temperatures.