Nintendo has always used Breath of the Wild as a base measure for how much battery life you should expect from the Switch. So how does the refreshed Switch stack up?
The MeeMeGame Channel on YouTube have been fortunate enough to get their hands on a refreshed Switch, playing Breath of the Wild at half brightness with Flight Mode enabled and sound almost all the way up.
Using a time lapse recording and playing the entire way through, the new Switch lasted just over 5 hours and 36 minutes before the console forcibly shut down. That's more than double what I usually got on my Switch with Breath of the Wild, which is a pretty solid improvement given that the refreshed Switch has the same battery as the original model (it's just the SOC and NAND memory that have been updated with more energy efficient versions).
That's pretty decent. And it's also exactly bang on with what Nintendo said the new Switch (which has the XKW prefix on the serial number, if you're interested) would do. So extra props for being on point with the advertising.