I would suggest you stop trying to run the battery so low.
Take a look at the battery section in the FAQ (http://www.kboards.com/index.php/topic,73465.msg1181726.html#msg1181726) - there is no problem with charging the battery up at any time, but you can potentially damage the battery by running it completely flat - especially if you ignore the low battery warning and keep running it lower.
Why do you say you have to wait 15 minutes to keep reading? If you charge from the mains you can use the Kindle while it's charging, if you are charging from a PC then you need to connect and then eject the Kindle at which point it will still charge but you can carry on using it - see http://www.kboards.com/index.php/topic,73465.msg1181732.html#msg1181732
For your problem of not receiving the messages, my only thought is to try a restart, Home...Menu...Settings...Menu...Restart. If that doesn't help it might be best to contact Amazon, http://www.kboards.com/index.php/topic,73465.msg1181468.html#msg1181468
Take a look at the battery section in the FAQ (http://www.kboards.com/index.php/topic,73465.msg1181726.html#msg1181726) - there is no problem with charging the battery up at any time, but you can potentially damage the battery by running it completely flat - especially if you ignore the low battery warning and keep running it lower.
Why do you say you have to wait 15 minutes to keep reading? If you charge from the mains you can use the Kindle while it's charging, if you are charging from a PC then you need to connect and then eject the Kindle at which point it will still charge but you can carry on using it - see http://www.kboards.com/index.php/topic,73465.msg1181732.html#msg1181732
For your problem of not receiving the messages, my only thought is to try a restart, Home...Menu...Settings...Menu...Restart. If that doesn't help it might be best to contact Amazon, http://www.kboards.com/index.php/topic,73465.msg1181468.html#msg1181468