Tech giant Samsung has been teasing about its upcoming Galaxy Note9 release, but accidentally gave more away on Friday when it temporarily released an introduction video online.

Samsung has been posting tantalising ads on social media sites like Facebook, hinting its upcoming Galaxy Note 9 smartphone will have extensive battery life. However, until Friday, the South Korean multinational conglomerate has been tight-lipped on much else.

The Samsung Galaxy S9 was released in March, while the Galaxy Note9 is slated for a 24 August release, around two weeks from the upcoming 9 August reveal.

However, in an accidental release by Samsung New Zealand, an unfinished Galaxy Note 9 introduction video appeared briefly on YouTube.

The company took it down, but not before it was watched, and even downloaded. Whether it was truly a horrible mistake or a clever publicity stunt, is not possible to discern, though it does offer 30 seconds of insights into what is to come.

The video has been removed from YouTube, but a saved copy can befound on a third-party site here.

The video shows the Galaxy Note9 can support an incredible 1TB of storage — “the power to store more” and “delete less”, the video says — with at least one model of the handset having 512GB internal memory, and supporting microSD cards up to 512GB in addition.

The “all-new powerful S Pen” is revealed in gold, coming with the blue version of the phone, writing on the screen while still locked.

The phone has a “powerful all-day battery” the video says, in line with the Facebook advertisements, but no specifications are yet given, though a disclaimer states this is based on the usage profile of an "average" user, determined and assessed independently by Strategy Analytics with the pre-release version of the 128GB SM-N960 model, and says "Actual battery life varies by network environment, features and app used, frequency of calls and messages, number of times charged, and many other factors."

The video ends by saying this is “the new super powerful Note” – the Galaxy Note9.

Good news: the video shows a 3.5mm headphone jack.