That being said, I feel pretty confident if I get the UMS4.
My XTAR VC8 fits Thrunite and Imalent protected button top 21700's. Good charger. Nice features. No complaints.
From personal experience the vapcell s4+ will fit. I own both the batteries in question and the vapcell charger. I also trust what RC says implicitly. The Nitecore batteries are tricky. From my experience with two of them, they only charge well with the included usb cable. I have several usb-c cables that will charge anything else but no matter what the cables are incompatible with the Nitecore batteries. I intend never to buy another proprietary battery if I can avoid it
David
I measure with caliper 80,89. I will wait the 26800 (green) and i try to charge.