My mini couldn't cut it on a trip i recently took. It didn't last two flights that were about 2 and a half hours each. I have a first generation green mini. I know they just dropped the price in half on the battery replacement. My question is... do you get the battery that is in the second generation mini meaning 18 hrs of battery life... or do you get the same that is in the first generation mini... featuring short life span and 8 hrs?