https://techcrunch.com/2018/08/09/after-the-note-7-stumble-samsungs-note-9-gets-big-battery-upgrade/

It understandable took a few years for Samsung to get back on the horse, but the company is finally read to push the limits of battery life yet again. Announced today at an event in Brooklyn, the Note 9 presents a considerable jump in battery capacity over its predecessor, jumping 700mAh to a beefy 4,000mAh. That’s the biggest ever for the line.

The on-going Note 7 saga did have some upsides for the company, forcing its hand into launching one of the industry’s most comprehensive battery testing procedures. Naturally, that eight-point battery test was a centerpiece of today’s big event, noting that while the company was pushing the boundaries yet again, it’s still doing its due diligence.