This was the first charger that I bought from Lightmalls and I've been totally happy with it. It will display the status of and charge just about everything, except for maybe rechargeable alkaline (and who even uses those anymore). As others have mentioned, this can't fit four 26650 batteries at the same time, in fact you'll have to fiddle a bit to even get two of those on it at the same time, since they can't fit in adjacent slots. Due to the addition of the case stiffening rails on the two outer edges, which are a little too tall near the positive terminals, this physically obstructs those larger diameter batteries, in either outboard position, from sitting in the slot properly and making good contact. So, it's pretty easy to get one 26650 battery into one of the inner slots, but you might, or might not, be able to get a second one to make good contact in either of the outer slots. That's really a shame, because I love the run time those bigger batteries offer and I have one of the LM XHP 70 LED flashlights that uses two of those 26650 LI-ion batteries (it's awesome, by the way). So far, I have been able to successfully charge 2 of those at once, in this charger, but only just barely. Other than that, it's an awesome charger, as is it's less expensive sibling, the Intellicharger i4 (which I use as my go to travel charger).