Stangman, before jumping on this charger look at the wattage specs from the Amain link above:
"This charger is rated at 6S, 6A with a 50W power limit. It is important to understand the interaction between charge current and charge watts, as the maximum charge current will go down as the voltage of the battery being charged is increased. Hence the 6A charge rating on this charger does NOT mean all battery packs up to 6S can be charged at up to 6A! The maximum charge current for a particular battery pack is determined by the max power of the charger, divided by the voltage of the battery being charged. So a 6S Lithium battery (22.2V) can only be charged at a maximum of 2.25A on this charger (50/22.2 = 2.25A). A 2S Lithum battery (7.4V) can be charged at the full 6A charge rate (as can 7.2V NiMH batteries), but a 3S Lithium battery (11.1V) can only be charged at up to 4.5A (50/11.1 = 4.50A). To determine the maximum charge rate for a particular Lithium battery cell count, use the formula below:
Max Charge Rate = 50 / (3.7 x Cell Count)"
It is only a 50 watt charger and with your Trex 600 packs it will only charge them at around 1/2C (at full charger capacity). Your charges will take a bit longer than normal. This is the reason I and others went with the Hyperion inet charger (LINK)
because it will push 250 Watts. Yes, its a 12V only unit, but you get the ability to charge your packs at 1 or 2C if you desire.
The problem with most AC/DC chargers is that the AC converter inside is usually on the weak side (so it can fit in the charger). When you are charging big packs, it is best to get a charger that can do the wattage and get a good 10 amp or higher 12V power supply. The AC/Dc Hyperion works, and does a great job - just dont expect it to charge your 5000mah packs too quickly. (just my opinion)
Go Fly, Have Fun!!
-Team Quick UK