When you look at the nitecore charger and you see the i4 you will want it, but unless you only charge 1-2 at a time, it will take forever. The mA output to each battery gets reduced when charging in parallel. Basically means less batteries will give you a faster charge. My friend put 3 MNKE's, and the Panasonic 18650B 3400mah on his i4 all at once and it took close to 14 hours to get the 3 MNKE's done. He took them off and the darn 3400mah took another 6 hours. I don't have that kind of patience so would never run more than 2 on a charger at once.
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