There absolutely is!
To get more battery life, you need a bigger battery. And that is exactly what the Joye eGo is. It is threaded to take 510 atomizers, so all you would need is a couple
batteries, and an eGo charger (don't try to use your 510 chargers with it - it can screw up the charger, or the battery).
The eGo is the size of a small cigar, with a tapered cone on it to give it a "finished" look and also tighten the air flow a bit. You may find that alone improves the vapor production you're getting.
But if that's not enough, you can try Low Resistance (LR) 510 atomizers. They pull more power, for a warmer vape and more vapor.
However, I would recommend against using LR atomizers on an eGo. Lots of people do with no problems, but for lots of others (myself included) it can kill your battery. An eGo battery doesn't have high enough amperage to run an LR atomizer safely, and the chip controling the manual button can also fry out from the heat. If you want to use LR atomizers, I would suggest looking into a mod which takes external batteries.
But for now, just try the eGo. It may be all you need.
EDIT: Ha ha, cheers ropetrick! Harrtato, you can see the size of the eGo in my video linked to above.