Originally Posted by liteon163
It is possible to turn the screen off manually while running Navigation. You'll still hear the voice prompts, too.
Exactly right. If you can do the turn-by-turn via audio, leave the screen off.
It's possible, some other LG charger combo uses an extra wire/wires in the charging cable to charge at higher rate... I'm looking for postings to that effect and will repost here if I find something.
See this post:
Otherwise, I know on LG's forums, the product expert has forwarded our concerns to engineering. We have to be able to watch video or run NAV (for hours on end) on the charger and not have the phone shutdown...