I was just trying to find out the difference btwn that one and the ego 2.5. I was also looking into reviews on Riva 1100 that was suggested.
One difference is the one I linked is 900mah and the Riva you are talking about is 1100mah (milliamp hours) so the 1100 ones might last a couple more hours..most likely they are a bit longer too. Some say the KGO's put out higher volts under a load. Anyways I have 3 of the smok Tech batteries in that kit and have been using them months..I usually only charge one a day..but I also use some auto batteries.