joaopra wrote:

I2 Yes - SKU 1811800

I have the i4, been using it for almost a year now, with same 4 batteries (rotation) and it's been fully charging them to 4.20V (confirmed with multimeter). I fully charged 2 of the same batteries on my new D2, measured (with multimeter) them at 4.17V, then put them on my i4 and it charged them all the way up to 4.20V.

So, if you say that your i2, charges up to 4.17V, then it may be something with the 2 slot battery Nitecore and not necessarily a feature of the new D2... ?