the uni pro is my secondary device but the
they’re on alibaba too for bulk sale/price
is the better one for me. I haven’t tested out different carts but all of mine have fit.
what I like about this battery is the variabile wattage as opposed to votage. it goes from 1-20 W and seems to do some specific calibration for the ohms of the cart (may be placebo).
But a lot of temperature settings, the most variable battery I’ve used; as low as 1.15v w/ .05 increment changes in voltage.
but like all magnetic batteries, its weakness is the detection. I have yet to find a solution to that stuff but when it detects it’s pretty nice.