10 points for crash durability, this pack took the full brunt of the crash when my Trex600 went in, and it’s still rocks.
See: http://heli.brixtonjunkies.com/2009/06/12/rhino-zippy-4900mah-6s-lipo-review/
This morning was perfectly still and clear again in London so I was out with my Trex 600 EP before work. The Rhino 4900 6S 20C batteries continue to impress me. This was the forth cycle today and they are still awesomely powerful with no sign of puffing or fatigue what so ever 
I noticed on the second flight something hit the blades, like a bug or something, but it was really just my subconscious that noticed it. After the third flight I noticed a slight buzzing coming from the tail and sure enough one of the screws that bolts the boom-support to the main frame was missing . Needless to say I considered myself very lucky and called it a day.
It’s not often there are no warning signs before things go terribly wrong
Yes that’s right I said it today was choppatasic, super still air this morning with good visibility, perfect conditions for 3D.
I’m up to my third cycle in on my Rhino 4900mah6S 20C packs and they are loving life in the Trex 600. I was practicing funnels tail down both upright and inverted…I just need more stick time.
I just brought 3 based on the fact they are so dam cheap (the cost of 1 well known brand). They also weigh exactly the same as a TP5000 6S V2 (+- 2grams). If that’s your current battery then COG wont change. They come pre-installed with deans connectors which is a nice touch. The balancer connector is an “Align Balancer Connector”, so it’s easy enough to connect any type of balancer with the right adapter.
When I first ordered them I was a little concerned that the 20C rating might be a little low for hard 3D but after the first flight test that doesn’t seems to be the case at all. They were barely warm and they have some serious power, as much as I’ve ever felt with other well know brands. I don’t have any hard data to support that but my Trex600 “feels” like it has a tonne of power, and that’s good enough for me.
Perhaps they are rated for 20C in order to get a higher level of safety or performance?
I would urge others with a Trex600 or similar to think about trying these batteries, they are serious value for money. These batteries are going to force the rc battery industry to reevaluate current pricing models, which is long over due IMHO.
The only question now is how many cycles will I get with these batteries?
Rating 9/10
These suckers are super cheap via http://www.hobbycity.com who are based in Hong Kong. These batteries will be used on my Trex 600 for hard 3D, so I hope the 20C rating will be okay. There have been lots of good reports so I hope so…
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