.
Has anyone tried these yet? They look to be a little heavier than the other LiPo's, but if they're tougher they may make good practice batteries. . .
.
http://www.hobbycity.com/hobbycity/s...dProduct=14615
.

They are awesome!!!!!!!!!!
I ordered the 5S now they are available, I tried them on my Habu jet, I the motor was as fast(being stock) as the upgrade motor!! and I charged them at 7Amps being the capacity 3.3Amps.

Those are the best batteries I have ever tried, and tried Thunder Power, Flightpower, and Rhinos. Simply put, no comparison, but, as you said , they are heavier.

Regards

Alejandro P.

Ordered a couple of the 2200's for my Vanquish.  I'll abuse those and see how they act.  Still need to wear out my Turnigy's . . .

It's funny that this topic came up. Yesterday I was looking at different battery options. I figured I'd try a set of these since they are cheap. I went against my better judgement and got the 45C packs. I had bad luck with other 45C packs in the past but, what the heck, the price was right and it's the off season. Time to experiment.

I bought the 45C 4000's. You don't need 5000 for anything being flown in 2011. I use 3000-3200 typically for P11. So these should work. They weigh a bit less than my TP 5000's (according to the website...). I almost got the lighter 25C packs but figured "what the heck, if I'm experimenting then I might as well try the 45's".

I'll report back when I get them in the air

.
When you quote these numbers, are you including the 20% reserve "they" say we should leave in the pack?
.
<edit> Never mind. . . 4000 - 3000 = 1000 . . . 25% reserve . . .
.

</snip></snip>

Thanks for doing that! I'm too impatient to 'properly' take care of my batteries, so nice to hear how they withstand 'normal' 'abuse'.

Lately I'm thinking of going higher C, lower mah.

.
I have two sets of Revolectrix 4S-3300 Mah batteries also for my Vanquish, but they are a smidge too heavy at 13.9 oz.  Even though the 2200's give me less flight time I like how the plane flies with the lighter batteries.  The Rev's are OK, but you really have to keep it "on the wing".
.
We'll see how the Nano-Tech's hold up when they get here.  They haven't left Hong Kong yet.  Hopefully they will get some at their US warehouse soon, shipping is $4-ish USPS Priority from there.
.

I would disagree, I have repeatedly used 4000 mAh flying F-11, and P-11 in certain conditions. Sure you can do 3300 mAh under the right conditions, but you are leaving no room for any modification of your flight.

Go out deep to 180-190m and fill the box in F-11 (or P-11 for that matter) on a 20mph wind, you won't likely make it with a 4000 mAh pack.

Not trying to be argumentative, but some people read the boards and take things as gospel, and there needs to be some caveat's in place on such comments.

Even the new Masters short pattern if you push it out and fly big and fast you can easily get near 4000mah. I can fly it in close and only use about 3200, but if I fly bigger, especially in a direct cross wind, I've been to about 4100 a couple of times.

Arch

Yep, you guys are right, you can burn through more than a 4000 pack can handle. I shouldn't have made an absolute statement. As they say "Your Mileage May Vary" and that can be heavily influenced by flying style and airframe. I should have stated that you don't TYPICALLY need 5000 packs for anything being flown in 2011.

For me, with my power setup and airframe I can probably make the 4000 work in almost all conditions. A 4500 would be just right. They didn't have the 4500 available yet so I'm trying the 4000. At about $60 per pack it is worth a try.

This should do OK for most of the conditions I fly in. I do have the TP 5000's for those super windy times. Hopefully I won't be using the 5000's much. I only had to pull that club out of the bag a couple times this year. I flew all my contest F11 flights with the 4350's. I noticed a big difference between power consumption per flight on my Visa vs my Passport. I was running 3600-3800 on a regular basis with the Passport for P11. Same motor and ESC on the Visa typically runs 3000-3200. Its lighter and less draggy.

For F11 I run 3200-3600 or so on the Visa, maybe 3800 in 15mph wind. The Passport is usually over 3800 and I've been over 4000 in the wind. But even then, I think that 5000 is still larger than required.

So, yes, we do need the proper caveats.

One of the other things I am going to do with these packs is to see how they stand up to constant pounding at or over 80% discharge. If you occasionally exceed 80% discharge then you are probably going to be OK. Drain them 90% every flight and they'll probably have an early trip to the salt water tank. These are an experiment for me so I'll see how they do. I'm really curious to see what the power consumption looks like when compared with my TP 4350's for the same flight profile. My previous tests with the 45C packs and Chinese packs were failures. I hope this works out a bit better.

Sorry to say but I think that 5000mAh is absolutely needed in windy conditions because the batteries should not be discharged more than 80% of their nominal capacity, for many different reasons.</p>

Also, increasing the C rate and taking lower capacity at the end of the day will give very similar result. Batteries with higher C rating give more Volts but are also more heavy for the same nominal capacity.</p>

I have been really surprised to see how much abuse my Rhino 4900s have taken sofar. I have had a few occasions where the Spin99 reduced power when coming in for the landing due to low voltage with the battery really being empty. Also many occasions flying upto 4500mAh. Still they behave very well and I now have 150 cycles on each battery (I run 3 sets). So, I am not sure the 80% rule is really true. I think more important is storage voltage (don't leave your packs full) and temperature (storing in a fridge would be perfect). Just my 2c, of course.

Volkert

yep i have gotten 2 of these and they are real powerhouses, the high discharge rates are awesome, plus you dont have to charge at 1C!

Volkert that is a really good observation! Can you please tell, if you remember, how many mAh did you put back in after Spin99 reduced power? I am asking this because I have a feeling that Rhinos 4900 are underrated in terms of their nominal capacity.</p>

Discharging LiPos down to 2,7V cell is not very healthy so I am not going to do that intentionally with my big packs , but I do remember experimenting with some smaller Rhino packs and they were all underrated by 20% from their nominal capacity. That might be the reason why Rhinos are so good. On the other side Kokam gives nominal capacity based on 1C discharge  down to 2,7V/cell.</p>

so when this happened (it was not intentional, I was flying without the bellypan since it was in repair which made the plane have a much bigger drag) although the cells are normally always very balanced some now read2.6 or 2.7V, others 3.1V. When recharging I put about 4800 back into the packs. I am travelling now but can check, I always write down every charge I make to keep count. It was below 4900mAh for sure.

Volkert

Hi Guys,

I flew the Turnigy Nanotech 4000 45C packs today. Overall, they did pretty well. Good power. Here's a couple Eagle Tree plots. The first is the nanotech and the second is a TP 4350 which has about 30 flights on it.

The real question is whether or not the turnigy will hold up over time. But it did pretty well today. The flight recorded on this Eagle Tree plot was for a big, fast P11 profile. I intentionally flew it farther out and fast. I used 3370mah on that flight, which is about as much as I think you should go for a pack this size. The pack was barely warm after landing. Ambient temps were in the upper 60's. It was noticeably cooler than my TP4350 or TP5000 after a similar flight profile.

We'll see if it is the bargain that it appears.

The all up pack weight for the 10s with my 4mm bullet connectors and velcro pads is 1150g. I chopped off the supplied connectors and excess wire length.

I'll let you know if they do OK or die prematurely.

Steve.

I should mention that this was with the following equipment etc:

CA Models Visa
Neu F3A-1 motor
Jeti Opto 90 controller
APC 20.5x14 prop
68 degree ambient
field elevation approx 400'

Thought about getting some weight info here, this is what I just measured on my scale,

TP 5000 10S 1190gr
Rhinos 4900 10S 1246gr
NanoT 5000 10S 1416gr (might loose 25gr after some wire trimming, conectors etc)

So far, Rhinos are the best in my opinion.

Regards

I have 10 flights on the Nanotech 4000's. So far I am happy with the performance. I have only flown P11 with them and am always under the 80% limit. I'll keep pushing them and let you know.