Nitecore S2 Superb Charger

[desmobob]

I have been quite happy with my D4 and i4 chargers. I recently saw S2 chargers on sale at a good price, so I ordered a couple. Usually, I do a little research BEFORE I make a purchase.

Well, it seems like this charger might not be so good. One early reviewer did not recommend it, and many commented that it could be dangerous. It was also noted that Nitecore made some changes to correct some issues with the charger.

Is there a way to determine whether or not mine are the "improved" models?

 

[desmobob]

Hmmm... not much action on this one.

Let me add another question: How do you determine which 18650 batteries are OK to charge at more than 1 amp? Is it related to their discharge capability in amps?