HybridMask wrote:

So, I will have any problem using a D2 in for the samsung 25R?
Also, what do you guys think about the D2 charger? better than the I2?

No problems ;-)
I wouldn't call it better for your application. As long as the charger can safely charge your cells at the rate you're looking for, and the cutoff works at the right voltage, you're pretty much set.