Flying and reading e-books

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I'm scheduled to attend a memorial for my uncle in Denver next week. I haven't been on a plane in 20 years last August.
Back in '99, I did not have a cell phone. I did have a Game Boy, and they made me turn it off when they removed the jetway until they reached cruising altitude, then made me turn it off again when they started to descend for landing.

My cell phone has something called "airplane mode" that shuts off all the transmitters. When in airplane mode I can still use Cool Reader to read text files or ebooks.
Would I be allowed to use my cell phone like this the entire flight, or would I have to turn it off like I did my Game Boy 20 years ago?
I've tried to look at United's website, but it isn't clear.

What about using my Kindle Keyboard with the Wifi turned off, which essentially puts it in Airplane Mode as well?

I'm just wondering if they have changed the rules on using electronic gadgets in the last 20 years. I mostly need to know if I should find a pocket-sized book to read or if I can just use my cell phone or Kindle. I have a low boredom threshold.

 

Nowadays it's usually ok to have electronic devices switched on in the airplane, but in airplane mode (or with the wifi switched off, which you should do anyway, as you will not have access to wifi anyway). The last few years you only need to turn off big stuff like laptops for landing and take-off, otherwise it's ok.

Used to be that I'd have to turn off my mp3 player as well, even if it didn't have wifi capability, but that's not been necessary for some years, now.

 

Thank you.

What about bringing a power bank, will they let me bring this through security?
https://www.amazon.com/Digital-Energy-2900mAh-Portable-Power/dp/B00BFXXU8U
(mine is actually blue, but I didn't want to waste time searching for an exact match when the only difference is cosmetic)

 

I think there is a limit on how much capacity such a powerbank may have (and there may be different limits between carry-on and check-in luggage), but I'm not sure what that limit is. 2900 mAh should be fine, though, as there are many phones that have that much battery capacity.

 

The question wasn't about the capacity of the power bank (though I keep wanting to call it a "Power Pack" because it looks and functions like the Game Boy PowerPack. Except I just looked it up, and the Nintendo version I was thinking of was just called a "battery pack" while the Nuby version that looks completely different that is called PowerPak (I had both at one point or another. The Nuby initially until I overcharged it by leaving it plugged in for a week when I got sick and then bogged down with homework, then I got the Nintendo version to replace it.).
That's what you get for not using it in 15 years.

The question was would they let me take that on board the plane. I've heard horror stories about things like deodorant and toiletries being confiscated, along with other doo-dads. No point in taking it if it will be stolen confiscated at the gate.

 

But the question is about the capacity of the powerbank, because they will only allow you to take so much on the airplane, and not more. I'd have to look up the capacity limit, but I believe there is one. So long as you don't exceed that limit, you should be fine to take it on board.

Deodorant, toothpaste, and other toiletries are subject to the maximum limit of 100 ml per item, and 1l maximum for all combined. In carry-on luggage. It's fine for check-in luggage. Also, I don't think any spray deodorant is allowed in check-in, but I might be wrong.

 

Makes me wonder if it's really about making people pay more to check stuff or to sell services like wifi, air-phones, and possibly recharging from the plane's power source (I heard some planes have that these days).
[sarcasm]Just like how movie theaters prohibit bringing your own popcorn or drinks "for cleanliness and safety". [/sarcasm]

 

It is not the airline, but the ICAO (International Civil Aviation Organization) that created the regulation
https://www.thejakartapost.com/trav...er-banks-on-airplane-cabin-now-regulated.html
and batteries, e.g. lithium ion ones are a fire hazard.

In Germany for example the battery of an "E-Roller" had caught fire unattended and those of "e-bikes" can be a hazard too.
https://www.bike-eu.com/home/nieuws...21.993774662.1570960792-1150599632.1570960792