All of us are aware, the original battery was terrible. One and a half hour minimum especially on AAA games is a horrible feeling, every video recommended a good battery pack to keep the deck alive and running. Now the OLED is here! so far my experiences with it have been at the minimum: 2 hours and 45 minutes (Minimum battery time was on Dying Light 2: medium settings, 60 fps) To around 5 hrs and 30 mins on lower demanded games. (Henry Stickmin collection reaching max) The new oled battery is stated to be on average 3-12 hrs so with this information at hand, I believe it’s not as necessary as it used to be especially concerdering TDP limits as well, however, I would love to hear y’all’s thoughts on the situation.
Personally when out and about, if I’m carrying my backpack or shoulder bag, I always carry a powerbank just in case. Not even specifically for the Deck, mostly for my phone and/or to borrow people that might need it.
So I’d say, if you own one that isn’t a hurdle to carry around, just do it.