Turnigy Nano-tech's

[adrianMS]

Less than two weeks since I had to put two 2200 35-70C to sleep-after only 25 flights on each of them.
Today my 4500 6S 35-70C packs started to get a bit squidgy & on checking them at home on my Hyperion EOS sentry one of the cells is showing 16% & the other 5 27-28%. The 2nd pack seems to be ok cell wise but alarm bells are ringing! (& after only 35 flights on each of them)
My small 35-70's just basically stopped performing & flight times dropped markedly (hence the salty bath) but I'm gutted to see my big packs going the same way.
I've already bought four more Turnigy 2200 40C (50C burst) 'regular' packs & it looks like I'll be buying a couple of 5000 6S 40C (50C) in the near future for my 550 (after reading good reports on their performance on Heliaddict forums)
The thing that's strange to me is that I'm also using 25-50C Nano's on my 450 that have done over 65 flights each & are still going as good as the day 1st I used them (tend to use them more indoors for gentler flight though as they struggle during outdoors lunacy) Batt chemistry cant be so different between packs-so whats going wrong?

[Mike Sanders]

I have some Nano Techs which are performing quite badly. I get much better performance and longevity from the ordinary light blue Turnigys. I only have 20C light blue packs though because I am still only hovering.

[bulldog5046]

That's interesting. Where did you buy them out of interest? I have a feeling the eBay sellers might be selling bad packs.

I bought 2 of the regular turnigy packs and they were shocking, one failed after 3 cycles and the other I'm still using but the voltage sag sets my alarm off pretty quickly. These were from eBay.

Also have 2 nano-techs from HK and they are awesome, have done about 15 cycles and the performance from them is the best of all the packs I've tried!

[sacko]

Nano-techs are generally terrible packs IMO, they wont just be the ones from eBay.

Cant go wrong with the Turnigy 30c packs.

[cjcj1949]

The harder you push any pack the hotter it will get and it's a square law thing. If you double the current you generate 4 times a much heat which is four times the temperature rise. if they start off hotter, at about 30 degrees C they are much happier. I've only tested one nano tech and one blue turnogy and the cheap blue 1 is twice as good as the nano tech. Others have said the same. The small nanotechs for the msr-x seem ok, but then Fixed pitch helis don't have pitch pumps which nee a lot of current.

[Mike Sanders]

I have bought them all from Hobby King. I have some 450 mah packs for the 130. Two of them are mismatched by more than 0.2 volts. I have two 3300 6s for the 600. They are getting a bit mismatched and very difficult to charge after 45 cycles.

[bulldog5046]

Seems odd, they are so highly rated everywhere else.

Mind you, the guy I return the dodgy blue pack to told me the nano-techs are good but stick to the 35c packs.

Also, I don't get how yours get so hot? Mine only feel a little warm and that's with the outside temp at 5 degrees. They can't be more than 15-20 in temp.

[Dave Rand]

Turnigy Nano-tech's

Nano's are awful packs, gave mine away. The standard blue Turnigys are very good on a par with Optis

[bulldog5046]

Hmmm.... I was going to order more nano-techs soon but now you've put doubt in my mind.

I guess only time will tell what is going to happen to mine, but currently they way out perform a similar aged standard blue one.

Im curious though, what 'issues' are people seeing with the nano techs? just not charging? Bad balance?

[Si Goodchild]

I'm not a fan of nano-techs either, they seem over-rated in my opinion. I much prefer the standard 40c Turnigy Batteries - lots of grunt and a good service life too.

Si G

[adrianMS]

All packs bought from HK. All batts are looked after & never abused. The lowest I've ever seen on a pack after landing is 17% (450) & 23% on my 550's packs. The 25C rated 450 packs come down warm & the 550's 35-70's barely warm.
I fly idle up as soon as I'm out of takeoff mode running +&-10 pitch, idle1 90-90-85-85-85-90-090 & 100% flat idle2 on both 450 & 550 (off the top of my head) flying acrobatics & modest 3D.
I'm wary of going down to 30C batts as my 25-50C nanos struggle a bit when I'm cracking on a bit. My new 2200 40C packs are delivering the goods so far.

[AcidDrink]

Re: Turnigy Nano-tech's

It's luck if a draw with these, they don't seem to have any quality control at all.

[Dave Rand]

Turnigy Nano-tech's

Out of the 6 I bought 2 were dead on arrival, Mine just felt underpowered and had very high internal resistance on all the cells up around 16ohms only had 4 flights on them.
The guy I gave them to whose just learning still uses them tho

[helinut]

Im a bit of a pack whore, and would rather take a load of packs to the field than charge there.
I have owned quite a few makes and in order of performance and longevity they are (best at top)
Optipower 30C
Hyperion 35C
Thunder Power (early ones)
Flightpower Evo Lite
Flightpower 20 and 30C,
Turnigy Blue,
turnigy Nano-tech

The nanoTechs perform OK, but they puff real quick and there reliability rate is the worst of all of those I have tried (cells dying, going way out of balance and IR well up)
Strangely, it wasnt till I started using NanoTechs that i really started looking after packs properly and storage charging, never leaving fully charged or over discharging, so its not for that reason they are at the bottom of my list.
If I could do it all again with hinsight, i would either buy TP 65C packs or the Optipower packs that I have settled on now.
You have to be very lucky to buy cheap and get good packs in this hobby

[cjcj1949]

HobbyKing is very strange. Some of their stuff is very good value for money and some is rubbish. Rather like their specs. When they talk about NanoTechs their specs have no technical value. They talk about internal resistance values without reference to temperature or pack size. They do much the same with two of their gyros. The Blue packs are cheaper than the nanotechs in my experience, and that of people I respect to give an independent technical opinion. With two gyros one is very good for £7 and the other rubbish at £10. Perhaps they just don't know what they are selling. With lipos the application is all important. A good 3D pilot will destroy a lipo that a beginner, struggling to hover will find satisfactory. The msr-x nano-techs may be ok, they are cheap. The best way to test lipos is to measure ir at a known temperature. Packs with varying ir will not survive long. Some chargers, like the icharger don't always give reliable ir readings on all cells in all packs. I use the Wayne Giles meter which measures each cell in the same way, within the limitation of cell balance wiring. To get a really accurate figure you need to get the balance wires on the cell terminals.