Don't know if this'll help at all, but here's my quantum battery charger story:
I have a standard Turbo battery and a 2X2 Turbo as well. Made the mistake of using the QT40 charger on the 2X2 in the middle of shooting a wedding and ended up sending the 2X2 back to Quantum for $75 worth of repair.
The only advice I can offer is make sure the battery and charger are supposed to be used together! I figured heck they're both Quantum Turbo batteries, and both the chargers came from Quantum they must be interchangeable...NOT!
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