They may look the same but the voltages on the Riva battery don't match up with what folks got on the Elegant.
In this thread (
http://www.e-cigarette-forum.com/forum/joye-510/65055-battery-voltages-surprise.html), the eGo/Riva tests at 3.07.
In one of the Elegant review threads, the Elegant tested out between 3.7 and 4.0. Check on page 3 of
http://www.e-cigarette-forum.com/fo...1915-cigeasy-s-kr8-elegant-ego-rest-us-3.html
Were I to take a guess at what the Elegant actually is, it appears to be a V-Go. You may want to check out this thread:
http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/105488-v-go.html#post1588118
From there, you can link to the China site selling V-Gos. You'll notice that they list the voltage at 3.7-4.2 which is closer in line with the tests performed by forum members.