Second question:
I own a couple of the larger vivi nova units but was thinking about buying the smaller size units. I thought this would be more pocket friendlier than the big unit. Does this unit perform good on the Twist? I assume the same heads are used for both the smaller and larger vivi's
The Mini works well on the Twist. My pet peeve with the Mini, (since, like you, I also had the Vivi Nova first) is that the top and bottom caps have the thread on the outside. This means that when you screw the top off and then replace it, any juice in the cap gets in the threads and squeezes out. Not a big problem but I do prefer the Vivi Nova because any juice in the cap runs back into the tank instead of getting on the threads. The heads are interchangeable. The capacity of the Mini, once the wicks are soaked, is about 1.5ml so It's not really a lot. I actually prefer the Vivi with the Shorty Tank Cone on the Twist. Hindsight is 20/20. Lol
I had a feeling and checked- I had it backwards-The cables themselves control flow to the batts and like billo said the 510 chargers are bad news for the larger eGo batts. Mismatched voltage can shorten the life of a device. The amps need to match or be more than the device being charged. Pretty sure that is correct - Better to order a Joyetech eGo charger cable, then any USB supply should work. I believe the fifty one trio is a smaller cig size batt charger- more than likely underrated for the eGo.
Again you have a few things backwards. I'll try to explain without stepping on toes. The Twist has 650 to 1000mAh battery.
The charger output should be less than the mAh of the battery. The recommended charger for the Twist is the USB Rapid Charger which is 5 volt input to the charger and 4.2 volt, 420 mA output to the battery. The charger for the 510 stick batteries is a lower output (150mA?). This can also be used to charge the Twist but will take about 3 times as long. (It is actually good for the battery to be slow charged occasionally.)
The wall unit's only purpose is to convert 110 volt AC to 5 volt DC. Any USB outlet supplies 5 volt DC.
The rating of the wall unit should be higher than the output of the charger. Obviously, if it is lower, then the charger cannot output more than it is receiving. Also, if you are vaping a pass-through connected to a USB (charging the battery and vaping) you will require 2000 mA (2.0 A) or more of output from the wall unit or USB connection in order to get the required power.
I hope this is easy to understand. Relax, Enjoy!