I thank you so much for your timely and informative reply. I purchased these two iPads in July 2013. They both will charge to 100% but the charge doesn’t last too long. My email provider is AT&T Yahoo DSL (but I am not at all happy with it as I receive about 30 crappy offensive spam emails daily - the blocking feature on yahoo is useless). I do have a desktop computer which is hooked up to a Netgear Router Wif Router. I don’t take my iPads and use them in public places - I only use them in my home.
I had both of these iPads turned off for about a good week and upon turning them back on, I was unable to receive any email on them (I kept getting a strange message saying Yahoo was the problem). Anyway, I left them both on all night last night, and this morning they both worked again and now seem fine. I was very puzzled by this and thus the reason I posted my inquiry. I hope that this is not too confusing. This has never happened before and I am thinking that maybe the reason they seemed to be stuck in limbo is because they were turned off for days and perhaps it took them awhile to catch-up or function properly again.....