Okay I stay away from forums but I feel there are some legitimate questions being posed here that I can help answer. That video is myself testing a tray I purchased off eBay from Ralphy. As stated I am running 8000Mah LIHV Multistar batteries. That tray is transparent red not magenta Ralphy, but it does help when giving it a quick look for orientation. The weight on Hobby King is incorrect the difference between the 2 in weight is: factory weight 568grams / 8,000 LIHV Multi 621g. Weight is not an issue and has not affected flight at all.
My flight times are around 25-30 minutes. As you can see I was at an AMA drone track. Before I made that video I filmed 6 races and let a few people give the H a try. That pack ran for 34 minutes on a very windy day until I received the first alarm.
As for the antennas I gave a quick rundown in the video comments since many people were asking. Just as a quick intro I have been building and racing RC buggys, stadium trucks, planes and quads since the early 90's. I am a Civil Engineer by trade but my Masters is in Electrical Engineering. I do have a Commercial FCC radio license as well as a FAA Private Pilot License. The antenna modifications were the result of a lot of testing but I would like to stick to the topic at hand.
I have had horrible luck with the stock packs. I have 1 with 5 flights that has a bad cell already. I have 5 stock packs, some run for 16 minutes others 12. After I had a pack suddenly drop from 15 to 14.4 in a hover while filming I started searching for another solution.
Please take a stock battery and check the cell resistance. I have yet to get a pack that doesn't have a cell under 8 milliOhms! I have several in the 12-14 range fresh out of the box. This is a general guideline I have gone by:
a) Packs that are as good as new: between 0 and 5 milliOhm/cell
b) Packs that have been used dozens of times, but still feeling fairly good: between 5 and 10 milliOhm/cell
c) Packs that have been used even more, and start to feel weak: between 10 and 20 milliOhm/cell
d) Packs that almost won't hold your model in the air anymore: over 20-25 milliOhm/cell
I now have 8 8,000 Mah LIHV packs for this Hex and all are below 2 milliOhm. Some have 8 flights on them and they have worked great. To date I have 37 flights on that tray.