Wow... that's awesome. Question is, why aren't there any company that makes a lithium rechargeable block that fits right into 580 or 600 speedlites? Makes charging and changing so much easier.
The problem is it still won't go straight through to the capacitor like a HV battery port.
This flash is obviously designed for no need for the HV port.
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I really didnt look hard but I am plenty sure there is more. 

