new Lipo tech available. Sounds incredible!

[Martianpc]

Here is the video I made today.
Flew for a solid 7 minutes in idle up (my throttle curve is 100-95-90-95-100). on a stock Trex 450se. Hard to tell since there isnt a ground in view, but some of the inverted flight and flipping are less than 10 feet high, which Im happy about since Ive only flown a bit over 2 months. Now, I just need a 430xl motor.

http://youtube.com/watch?v=28k1RGOqwik

[fire_paramedic]

Has anyone come to conclusion on these? I am seriously looking at buying these and wonder how you guys that are using and testing them feel about them latley after some more flight time ?. And would another battery be a better choice? Thanks

[Air_Alpheus]

I have 48 cycles on the test pack that has been discharged to 0 volts more than once and discharged below 2volts per cell on every use and I havent seen any drop in capacity or performance. I cannot predict what the next 50 cycles will bring but I know this battery is holding its own very well. Just imagine how much better the battery will perform when you take care of it...

[Air_Alpheus]

Well here it is the 50th cycle report. This was done using a CBA II
Battery analyser. The compare cycle was the 10 cycle on the battery, that was when I got the CBA II. I also took some high discharge tests also that I will post down the road...


http://i178.photobucket.com/albums/w241/Air_Alpheus/Airthunder50thcyclecompare.jpg

[Air_Alpheus]

This is from the otheRR forum from AirThunder...


Offer to Try AirThunder LiPo

Folks,

I thought I let you know that we have a trial offer for forum readers to test out our batteries. Please see our classified for details:

http://runryder.com/helicopter/t350322p1/

Thanks.

Barry H.

[jT415Gz]

Nice plus an additional 5% off.

Question: I use Flightpower's Evo 25 and it has great power, but is the power about the same, less or more when compared to Air Thunder's?

I am really curious about its 25C power.

[kgfly]

Here is the discount code: ...please use coupon code 922792 when checking out to receive 5% more discount.Vist our website for more information:

www.airthunder.com

Sale ends 6/17.

3S 2200 25c/40c, 30 x 37 x 113mm, 190g
List: $69.99
Sale: $59.49
With discount code: $56.51

Looks like a good enough price to be worth a try, shame about the shipping costs to Australia :arggg:

[fire_paramedic]

They are having a fathers day sale with additional 15% off and use the coupon code 922792 when checking out for another 5% off as stated above. I did and worked for me. $56.52 plus shipping for a 2200mah 11.1 3s pack. :D

[Air_Alpheus]

From all the tests that I have done with this pack it should be dead, but its is still going strong. It is truly 25C no problem...

[Air_Alpheus]

Here is a high amp test done on 52 cycle...

http://i178.photobucket.com/albums/w241/Air_Alpheus/52cycle.jpg

[kgfly]

Great to see real world info. After about 50 rough cycles it is delivering 88% capacity and holding over 3.5V/cell @ 10A for 63% of the cycle.

I personally don't consider 10A as "high". 10A is just hovering in a TRex450. It would be great to see curves for 20, 30, 40 and 50A. After all this is a 25C pack so should be able to sustain 55A. Of course it is possible your test equipment cannot apply a 500W load, I don't know ? :dontknow

[Air_Alpheus]

Its as high as I can get my equipment to go without spending 600 bucks for additional equipment for higher discharge tests ,125 watts is all I got. I will post some more Eagle Tree FDR info later this week...

[kgfly]

:thumbup:

[Air_Alpheus]

Well it took a little while but I got the cycles up there. This is one of the better batteries that I have used. Yes it is a little bigger and a little heavier but the performance more than makes up for its size. I have abused this battery pretty much every way possible. Discharged to O volts more than once, its drained to below 2 volts per cell on every cycle, it was even in a pretty bad crash and got dinged up a little, and it is still going strong. The capacity has not changed and there is 55 cycles on the battery, I am still putting in over 2100 mah on every charge. The battery has not puffed nor has it ever overheated. I have to admit that I was just as skeptical as everyone else, How can a little shop in Iowa have the latest and greatest in battery technology to date and at a reasonable price? but they do! So far I am a believer. Its nice being able to fly and concentrate on your heli and not worrying about how the battery is doing. I am still going to continue my abusive testing on this pack until it gives up the ghost. So stay tuned...

[fire_paramedic]

Sounds good, keep it up. I like what i hear so i bought one of these for my new mini titan, hope to get it in the air soon as i get it in and get it built. Dont think i will abuse (test) the battery limits though just run it till it looses power and see how that goes.

[Martianpc]

Thats how you are suppose to fly it, just go till you notice power loss and land. the abuse test are just to show extremes of how capable it is. Due to my own stupidity I left my battery pluged in and actually drained it till the main resting voltage of the pack was 2.4 volts, thats like .8 volts per cell resting voltage which is VERY low. I couldnt even get my DN charger to start to charge it it was too low. So... I took a 1000mah hextronic pack I have and just used a male deans ultra plug as a bridge and actually jump charged my Airthunder pack. It brought the voltage back, I still have no puffing, so I charged it up, flew it today and still got over 7 minutes of in air flight, while using idle up and doing 3d. I love this battery :hug:

[celter]

Sounds good, keep it up. I like what i hear so i bought one of these for my new mini titan, hope to get it in the air soon as i get it in and get it built. Dont think i will abuse (test) the battery limits though just run it till it looses power and see how that goes.

I find that the Air-Thunder batteries are a bit to large to fit on the battery tray on the Mini Titan. You can't get the canopy on. I guess I have to modify the canopy, because these batteries are keepers.

[Sensan]

Sounds good, keep it up. I like what i hear so i bought one of these for my new mini titan, hope to get it in the air soon as i get it in and get it built. Dont think i will abuse (test) the battery limits though just run it till it looses power and see how that goes.

I find that the Air-Thunder batteries are a bit to large to fit on the battery tray on the Mini Titan. You can't get the canopy on. I guess I have to modify the canopy, because these batteries are keepers.

I had heard this battery is designed for Mini Titan originally, there is no reason can't fit into Mini Titan.

[Air_Alpheus]

I wanted to see how temperature effected the performance, so I did a 28 amp discharge on a single cell at 55,75 and 85 (GREEN) Deg F. Here are the results. Seems to me the hotter the better...

[Don223]

Was anyone able to get an AirThunder battery to fit into a Mini Titan? Did you have to modify the canopy? If so, how?

I ordered a couple of these batteries, so they'll fit one way or another!

Regards,
Don

[fire_paramedic]

It fits in my mini with no mods. its kinda snug but it fits.

[Don223]

fire_paramedic,
Thats good to hear. I took an old pack and attached a small block of wood to make it close to the dimensions quoted by AirPower. Yeah, it seems like it will be a snug fit, but thats fine.

Thanks!
Don

[barryhu]

Hi Folks,

Just wanted to add that our batteries perform the best between 100 and 108°F as stated in the FAQ section of our website. It is unlikely that the battery will be at 100°F at the beginning of a flight under normal circumstance, but the initial discharge should raise the temperature naturally to the ideal range. If you fly on a cool day however, we recommend that you warm up your pack by putting it in your pocket for a few minutes first. This will ensure you get the peak performance from our pack.

The cell was discharged to less than 1.5V in the study. While this further proof that our battery can tolerate low voltage, we like to emphasize again that we do not recommend such practice. The dynamic between the cells in a multi-cell pack makes it a lot more complicated than in a single-cell situation. Please do not discharge our pack to below 2 voltage per cell.

Thanks.

Barry H.
AirThunder

[Wazzer]

Well i am not at all recommending this but I have a friend of mine who charges his AirThunder pack at 2.5C with no Ill effects at all, he just uses a balancer every charge. I have almost 50 cycles on my test pack and it is still going strong, I am pretty impressed so far by its performance.

Hey Air Alpheus

Can you give us any more feed back on your friends findings who is charging at these packs at high C rates?

How are the packs handling this?

Would love to hear more about this High C charging.
If we can charge at 2.5C and get charge times of 30mins or so this would make a huge difference to the number of packs required.

Eager to find out many thanks

Ben

[Air_Alpheus]

He is charging at 2.5C without any problems as of yet. the pack charges up in about 25 minutes. He does let it cool down to airtemp before he charges them up again though...