I agree, something sounds very strange. At under 1C rate (3.3A on a 5000mah pack), it will take over 1.5 hours to charge a depleted pack, but it should not be over 7000mah showing at all. The only reason I could see that is if the pack is way out of balance and the extra mah is going into the balancer. I have a cheap ebay pack that is always out of balance and it is not uncommon to see the charger showing numbers much higher than the pack really holds. Since the charger is fighting the unbalanced cells alot of the energy from the charger is simply wasted. I know at least with the Venom you should be able to see individual cell voltage, make sure they are reasonably close while charging. If the charger is struggling to balance the pack you may have better luck lowering the charge rate until the cells balance.