Slightly confused over all the various battery chargers available. I am looking for a suitable charger for 18650s (Sony vct4). From browsing the forum I know nitecore and xtar are recommend brands. I have been looking at the xtar range but notice difference in price between versions of the vp2, and vc2. I have noticed reviews from the vp2 have been positive but not seen much out there about the vc2. Would both these charger meet my needs? Which chargers do your prefer? Ty in advance