I need a charger for lithium ions. I need it for 123A, 18650, and 21700s and also eneloop AAs. It has to be able to do IMR’s with the 21700 for a new flashlight I ordered.
I saw reviews of the UMS4 and people are having issues with the charging cable not staying in tight since it’s a micro USB. I’d like an all in 1 charger that can do lithiums as well as my Eneloops if possible to save space. I’m open to ideas 
The new Miboxer C4-12:
Better UI, more chemistries it can charge, and can support even protected 21700s.
+1 New Miboxer C4-12 / Miboxer C4 Plus
The reviews look generally good of the new Upgrade version. Does this one suffer from the bad #3 charging port? It’s about $10 cheaper then the Nitecore
No, no problems with it anymore, especially since the first Miboxer C4-12s suffered issues from the 1st batch, which they did fix afterwards.
So, you are fully ok getting it.
Awesome. Thanks for the update. I’m looking forward to getting to try this one out. I’ll have questions on 21700s, but I’ll post that in the other part of the forum.
Does it charge IMR/INR batteries?
Yes, it charges every lithium-ion chemistry that is easily available(regular lithium-ion, lithium-ion iron phosphate, HV lithium-ion).
Awesome. It looks really nice on the company’s website.
Bought one recently, Miboxer C4-12 great charger. Batteries do not even get hot while charging (compared to my former charger, the nitecore). Very fast charging with 3A.
I ended up getting the Nitecore UMS4. I found it on sale cheaper so I went for it. The other charger seems like it would be a little better. I might go for it or a newer model when I have more money