Well, over my almost 7 years of vaping, I have settled on one charger that works best for me. Of course as always, YMMV. I have had some chargers, I don't remember what they were, and they are long gone. In the cabinet gathering dust are two Pila's,a Gryfalcon, an Xstar Vp1, and a couple others. So, I have settled on a xtar WP2. Nothing fancy, no led readout's or anything. I have used this charger for several years now and never fails to charge a good battery to 4.2 - 4.21, unlike all the other chargers I have had. So I needed another 2 bay and decided to go with the same, only this is an xtar WP2 II, and whaddya know, it works as well as the other Xtar. So that's it, no more fancy pansy, more expensive chargers for me.