Having trouble parsing this in my head.
So, I have two kindles. An old, first gen model and a fire HD. From the info I’m getting, I should be able to copy across from one to the other. What I don’t understand then is why when I download via USB, it asks me which kindle I’m going to use. If it is able to go on both or either then why bother asking? I’d try it for myself but the first gen kindle is completely flat and it’ll take hours to charge so I’ll maybe try tomorrow.
If you never connect to wifi then I take it that you are somehow downloading to your pc to transfer to a kindle device.
I think the reason they ask for a device is that they put that in the information in the cloud and for any DRM they would then block any other device from downloading through wifi because they haven't figured out your paranoia to wifi.
As to the battery problem--chances are there was a problem that required an update to fixed something at some point but since you don't connect to wifi they can't do the updates. The re-boot might have fixed it momentarily but don't be surprised if it happens again. However while rebooting there might be a possibility they slipped into the wifi somewhere and got the update. If you have close neighbors there could be one who is not security conscious who has an open wifi. I was looking at my available connections and I can see the whole neighborhood; however they are all properly locked down.
However if you don't use the wifi are you sure that your wifi is properly locked down.
At work I have partitioned out an internal wifi and the external. The external allows guests.
Sometimes an inside machine loses internal connection because its easier for it to connect to the guest account that is all external.
I have to nudge it back to the internal and log them in.
A lot of routers have the guest capability and depending on setup it could need or not need a password.
The best way is to force a password so you can control who uses the guest account.
I have 3 fires and one older model of kindle and use wifi all the time. Have-as yet- to have a problem. What are you 'fraid of.
Or as I say with my frozen Fettuccini Alfredo dinners.
"Fettuccini Alfredo--What are you al-fred-o?"