Steve, that's a Q500, and 2 years is an eternity in this business. I don't have a Q500, and everything I talk about refers to the Typhoon H with current equipment. LIPOs are a rapidly evolving tech, and note that at this time, all drone LIPOs are made in China, even Venom's, and there are criticisms galore of most.
Here's a cute test done in Far-Away-Land
this January with the TH, a stock battery, and the GiFi 7000. I say cute because I liked the music AND the compressed time.
They finished with almost the same results I had when I tested the stock vs. the 7000. They got 3 minutes more with the 7000, and I got 2 more minutes, a worthless difference as far as I'm concerned.
Now for the H520 and that 30 minute ride...