Doe anyone know how long it last? For example doesn't the battery wear out after x amount of years?
The lifespan (on average) would be 10.000 to 100.000 (write-)cycles.
But if you are done with it you should not leave the nano ledger s stuck in the usb port then right? Thus once you are done using it, just pull it out? And thats exactly what you should do... pull it out from the usb port since its not a flash drive?
Because i wondered was it bad if i just leave it plugged into my laptop all day or just leave it plugged in when not using it. That is probably bad idea right or it doesn't matter.
Well.. there is no reason to let it plugged in.
You theoretically expose yourself a higher risk when having it plugged in all the time (e.g. new vulnerability gets found, better to have it not connected in this case).
But practically, it probably won't make any difference. But why risking?
I just thought about something else. So you can put the 24 word seed in electrum if your device doesn't work or gets stolen or malfunction to get your bitcoin. Now what if you have other coins like bitcoin cash, litecoin, or those other type of coins? Then how would you claim your bitcoin cash? Which wallet would you have to download if you don't have another nano ledger s? For litecoin, it would be electrum for litecoin right? Now what if its all those other type of coins and not the popular ones. What happens there? So if you have like other coins, you have to download some other wallets in order to get it? The thing that is confusing is wouldn't certain coin wallets not have 24 word seeds and have lesser word seeds? Say you have dash and quantum. Well electrum isn't going to work for that right? So if someone has like 10 plus different coins, they going to need to download 10 different plus wallets assuming they cannot get another nano ledger s?
You can use your seed to generate all the private keys.
There has been an 'agreement' on how to derive keys from a seed.
So, regarding coins which don't have a wallet that accepts mnemonic seeds, you can just use a tool to derive the private keys you need, which then can be imported in any wallet.
And yes, if they hold 10 coins.. and prevoiusly used one wallet for those 10 coins (e.g. nano s), they have to use 1 wallet per coin (assuming one wants to use official wallets).
But there are also wallets which accept 100+ coins (e.g. mobile wallet: coinomi [1] - desktop wallet: exodus).
[1]
https://coinomi.com/[2]
https://www.exodus.io/