updated 11:20 pm EDT, Mon June 16, 2014
High capacity battery charges two devices simultaneously through 1A, 2.1A ports
Battery backups are generally geared toward multitasking, or made with a single device in mind. Many are bundled as an additional feature to a Bluetooth speaker, focusing on sound output first and charging second. This often leaves the unit capped at how much of the battery it offers up to charging external devices. But what happens when the speaker portion is removed, and the large capacity battery is left behind? A company can create a two-port charging solution like the Neptor NP056K. But would the Neptor be a good battery on its own? Find out in our review.