LiPo batteries should never be allowed to fully discharge or
they will be destroyed (and could be dangerous). It
isn't uncommon for a racer to forget to turn his car off
after a day of electric driving. This wouldn't normally
be too big a deal, except when Lithium Polymer batteries
are involved. If you leave your car turned on and your
battery plugged in, the battery will fully discharge. To
be sure that this never happens by accident, get into
the habit of always unplugging your battery in your
electric machine immediately after use (you should do
this even if you aren't using LiPo packs). This way it
won't be a huge deal if you forget to flick your switch.
To take this tip one step further, try to never store
your LiPo battery in your chassis. Taking it out forces
you to address the plug issue every time so you'll never
have a failure.