“I've only used this rig for 3 carts bit so for it works wonderfully!
In fact, one of the carts that I attempted to use that wasn't working in 2 pen 510 batteries was used on this unit with "shorted" showing up on then LED screen.
This unexpected diagnostic ability assisted me in tracking down the mystery issue for that particular cart. Bravo!
I would absolutely recommend this unit, at least for 510 treaded carts (all I've tried so far).”
