[chris1683]

I am no battery expert but I do know that Lithium Ion batteries do not have a "memory effect" like older Nickel Cadmuim (Ni-Cad) batteries did. This would be seen if you only partially discharged a battery and then put it back on charge again. Since this does not happen with LIon batteries I don't think that charging it overnight would cause any issues. I would also tend to belive that the phones charging mechanism automatically shuts off when the battery is reporting a full charge. This is seen when the LED light turns green and the charging bolt icon over the battery disappears.