LG V VX-9800

Hi all, it's been a long time since I posted on this forum. I've got a question about charging the battery both standard and extended for the phone. I know that the batteries are Lithium Ion Polymer which means that it is safe for you to charge them over night but if i do charge my batteries overnight very frequently, will that still burn out the cells in the battery? I know that for most Verizon phone batteries they only have LIthium ION which means that you shouldn't charge the battery overnight but i thought that our batteries were different in that aspect. How long does everyone here charge their phone batteries for? Thanks in advance for the responses.