Switch OLED model just got announced.

[theRepublic]

Rick1331 said:

It's not what I was expecting or when I was expecting it, but this is Nintendo... why change the habit of a lifetime?

However as someone who mainly plays handheld I'm quite interested. Am I wrong in thinking the battery life is better? The original Switch is not great on a plane :| and I've lost track how many times I've had to stop playing something to dock and charge (cant be bothered with the rigmarole of undoing the plug). 

I'd assume this is the last major upgrade before a new console... but then again this is Nintendo and I still remember the GameBoy Micro random reveal...

Here is what I could find.  It depends if you have a launch Switch or the 2019 updated Switch.

Does the OLED Switch have better battery life?

Apparently not. The Nintendo Switch (OLED model) will have the same expected battery as the updated Switch that was released in 2019, which is "approximately 4.5 - 9 hours" according to Nintendo's website. Please note that if you bought the original Switch that was released in 2017, which looks exactly like the current Switch, it doesn't have the updated processor that improves its battery life. The 2017-released Switch has a battery life of "approximately 2.5 - 6.5 hours."