Hi,
I have an Olive Musica Player that has been modified by Vinnie. The sound is rich, full, and emotionally involving. To answer your question you simply need to keep track of the charging light. When the player is off the light should either be green (for fully charged) or red (for charging) When the player is on there is no light. What you have to be careful of is to make sure the battery is always connected to the charger, and if the machine is not playing you are seeing one of the two lights. You should not, I repeat not let the battery run completely down! It really is not that hard to keep track of the time. Vinnie does offer an option to have a backup battery if you so desire. I hope this has been helpful.
ZLS