jess.nz
Your battery life should be a little longer but it depends on your usage. I have a couple of players and get from the worst 5hrs to the best 8hrs of continuous mp3 play with lcd sleep enabled, you can almost halve that for video play where the screen is constantly on and cpu drawing more power. Full charge times can be from 4 - 6 hours and your player must be turned on at the power switch.
On my Nano Clone there are 2 settings under LCD set in the settings menu, one black and the other darkle, I find that setting one usually sets the other but you still have to enter the other setting and accept the setting by pushing play.
The red light is an indicator that the wall socket is turned on and the charger has power. the green light is that the player is connected and charging, it should go out once the player is charged. If it is flashing with or without th player connected it may be dodgy.
The hour glass should only show when the player is cold started with the power switch, once the player is fully booted and running you should turn it on and off by holding down the play button for a few seconds. Using the switch will reset the player settings to default ie clock etc. If your player is rebooting for no reason then something is not right. You could try using s1fwx to extract your firmware, repair it and then load it back to your player, then format your player and see how it runs.
You can download s1fwx
HERE and a guide to using it is
HERE
You should keep a backup of your firmware, if you have problems with your player in the future it could be very handy. If you get a chance upload it to site from the Downloads>Uploads By Members section.
Let me know if repairing the firmware fixes the reboot problem.