Briar
On my ego the battery its a lower voltage coming off the charger as i can use the same tank on ego and my don and the vape is fine on the ego but not on the don. Im not complaining though .

I often hear on the ego the battery is rated around 3.4 or so.
On the Don the batteries are 3.7 and off the charger around 4.2 which may be too much for the low res Ce2.
Different juices may or may not make a difference as well im not sure just going by my experience with my juice i use which is 100% Pg.
I turned the pot on my vv box untill it just fired up the ce2 and it has no meter so i cant tell the volts.
I vape a tobacco e-liquid and its 100%Pg my guess is not all e-liquid burns the same as Pg is very thin compared to vg and the nice thing is if my 100%Pg is not leaking in this tank then thats a real big plus.
I ofter hear that ce2 ratings can be somewhat different than whats stated from manufacture but i have no way to tell.
Today my visions stone tank from gotvapes arrives and i will put it on my megalodon and put it thru its stages to see if i get the same results useing the same e-liquid as i only vape 1 type of e-liquid called 555.
But to me it does not matter as i have many ce2s to cut out of there stainless tubes rated at higher ohms up to 3.0 and those work just fine .
I plan on eventually useing my ce2s in these vision tanks by unsoldering the 2 wires and simply lifting its porcelain cup off the airtube and putting another on and resoldering the 2 new wires.
Im retired and need to watch my funds but have bought 4 vision tanks from gotvapes and with my higher ohm ce2s these are something that should last me a long time .
Ideally i would eventaully mod the bottom cap with a permanent 510 connector and then all that i would do is screw in a new ce2 to it.
Regardless these by far are the best tank for the best price i have ran across and i can personally tinker and really really enjoy them for my personal use.