Just got a Gravedigger with 8.4v, 3000 7 stack. Just charging it with the provided charger. Intial charge was just over 8hrs, and lasted 20mins of bashing. LED was flashing red and battery was very hot. I'm new to the batter rc's used to run a revo 2.5 years ago. Curious if this is normal ( heat and flashing light ) when the battery gets low? Will this set-up always take 8hrs to recharge? If I leave in on charger after light turns green does it go into a trickle mode or does the battery need to be unplugged shortly after full charge? Any advice would be appreciated.