I am very satisfied. This is something everybody should have it.
Does 2x26650 charge at the same time? I've read on the i4 review that 4 x26650 don't fit inside at the same time.
The NiteCore InteliCharger I2 is a very flexible charging unit that is capable of charging a wide variety of rechargeable batteries, in an extremely efficient manner.
i have both i4 and i2 and both seem to work fine. i got the i4 before i2 was available, and even though in theory i4 may be a bit faster i would rather get the i2 because it's cheaper and smaller, and i never need to charge more than 2 x 18650 cells at a time.