Prong was an iPhone battery case company based in New York City, primarily manufacturing accessories for electronic devices.
Prong was founded in 2011 with the production of the PocketPlug. The company later introduced the Prong PWR Case, a removable battery case with integrated prongs.
Prong introduced the PocketPlug, at the Consumer Electronics Show in January 2013. It was first reviewed by The Washington Post, citing that they enjoyed the product, although adding the critique that a battery pack was needed and the product had limited usability during charging. The New York Times gave a similar review. CNet felt that the phone was lacking an external battery.
Prong ceased trading in 2017.
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