I've never worked in a grocery store either. It's a common mathmatical term that I figured people would be familiar with. Says a lot about the public education system. It's sad that unless a person seeks knowledge out for themselves, they get fed the minimum to get them to the next grade.. I was always the bookworm type, grabbing on to a subject and learning every facet of it that was available to me. I guess that's why I'm so detail oriented in my work and with my racing.

But I digress, the question was about chargers.. The 16x3 and 16x4 are both excellent chargers. The 16x3 will handle less cells (4-8), has a higher discharge rate and can charge at 6.5A. The 16x4 will handle more cells (1-15), has a lower discharge rate and can charge 5.5A. For racing, the 6.5A charge rate is a good thing, for bashing it's overkill.. Both are fuse protected, and that fuse is user replaceable. That's a very good feature to have. For my money, it's the 16x3v6..

Consider also the 16X405D2.. It handles 1-10 cells, has blue backlit screen (great at night), memory slots for different types of packs, has a temperature probe with user definable cutoff, 5A charge and discharge and adjustable delta cutoff... It's $155, which is very little more than they other 2 cost..