Nintendo has updated their Switch hardware comparison page to showcase the differences between Switch and Switch Lite, but now we also see that the regular Switch is getting a revision as well. This version, featuring model number HAC-001, is going to give a sizable boost to the Switch's battery life. The current Switch's battery lasts approximately 2.5 to 6.5 hours, while the revision will get you approximately 4.5 - 9 hours. Of course, it all depends on what game you're playing.
This Switch revision is due out in Japan, Asia and North America sometime in mid-August 2019. Europe will get the hardware in Sept. 2019.
Over in Japan, the Switch box will also be updated to reflect the hardware change. We're not sure if that will be the case in NA/EU/Asia.