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e-Electric Batteries & Chargers > Anyone Heard of these new Lipos Update # 4 Video Added
 
 
ShellDude
Elite Veteran
Location: East Coventry, PA

Sure... my Triton always stops at 12.60 and about 30 minutes later the packs settle down to 12.46. The blinky takes them down to that as well.

Did I mention standing voltage was 12.46?

~~OCHC~~
http://www.glumbert.com/media/spiders
04-26-2007 Over year old.
 
 
Air_AlpheusVeteran - Location: Trafford,PA - USA -
4th flight I am discharging to 0volts tonite...



Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
04-26-2007 Over year old.
HOMEPAGE  
 
 
Air_Alpheus
Veteran
Location: Trafford,PA - USA

I discharged the pack as far as I can get it. I put my charger on discharge Nicad setting @2 amps and let it go.There is still no puffing.



Rechecked the pack after letting it sit for 10 minutes.



Getting it to charge back up took a couple of tricks. I had to put it on Nicad trickle charge at first to get the voltage up to 8.4 volts then I put it on regular lipo charge with the balancer. Its charging now.

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
04-26-2007 Over year old.
HOMEPAGE  
 
 
gordo high
Senior Heliman
Location: down yonder in the south

I have an 1800 FP 3s battery in my DX7 which I forgot to turn off once. When I checked the voltage it was 2v for the whole pack. I did a similar charge as you did to get the voltage back up so I could charge mormally with my tp 1010 and 210v balancer. The lipo is fine and I am still using it.

In my case I think it was the very low rate of discharge that kept it from puffing but who knows for sure. Anyway, just a FYI on this same subject.

Very interested in this new type of lipo though, great info being posted.

Honey, I just need this one more thing and then I'm set..
04-26-2007 Over year old.
 
 
umdpru
Elite Veteran
Location: Massachusetts

discharging the pack once like that or even a few times will not give you an accurate idea as to its behavior when discharged repeatedly like a newbie might do with a lipo. id be interested in seeing how it fairs after 20 or 30 repeated low discharges.

on another note (im always sceptical at first) i have discharged my TP 2100 Prolite several times past 2000mah and the pack doesnt show any signs of weakening. Ive probably done this 5 or 6 times.

The true test for these packs is to absolutely ABUSE them for 100 cycles and really put the manufacturers claims to the test. I know my prolite would probably die if i tried to do that cycle after cycle.
04-26-2007 Over year old.
 
 
Air_Alpheus
Veteran
Location: Trafford,PA - USA

Every single flight I put on this pack I run the heli until the blades will not even spool up anymore. I'm putting a pretty hard beating on it so far IMHO. I will continue to beat the battery up some more...

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
04-26-2007 Over year old.
HOMEPAGE  
 
 
martinic
Veteran
Location: NB, Canada

Cool - it's enough to discharge to 0 once to show it can take it. That's really remarkable - thank-you for trying it.

The most it'll go down to under flight conditions (no load) is 9V anyway. If it'll run down to the point the heli won't fly and you do that 20 or 30 times and it survives, then that'll be very, very impressive!

I'm impressed already!

Somebody has got to try the overcharge condition in a controlled environment. If it doesn't burn, then that will cover off the other extreme. I suppose puncture and crush tests would finish off. Air Thunder, are you watching?
04-26-2007 Over year old.
 
 
ShellDude
Elite Veteran
Location: East Coventry, PA

I don't recall seeing anywhere in their marketing material that it was safe to overcharge or puncture these packs. I want to see it reach their 100 cycles claim.

~~OCHC~~
http://www.glumbert.com/media/spiders
04-27-2007 Over year old.
 
 
Air_Alpheus
Veteran
Location: Trafford,PA - USA

Well I charged the pack back up, all is well more in flight data soon...

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
04-27-2007 Over year old.
HOMEPAGE  
 
 
SBH
Heliman
Location: Coralville, IA - USA

Greetings from AirThunder

Hi Folks,

Please allow me to introduce myself. My name is Barry Hu, and I work for AirThunder Li-Poly Battery.

I have been following the discussion. We, like all the friends here, are seeking the holly grail of the LiPo technology. We think we have made some great stride and have a very good products. I have been watching the discussion on the sideline as my opinion cannot be considered objective. Lately however, I feel the expectation expressed in the forum has become somewhat unrealistic, and I feel I'm obligated to make some clarification.

Our batteries are engineered to withstand a low discharge voltage. The recommended minimum voltage is 2 volt per cell. This is shown in our specification, and is lower than most if not all other LiPo batteries on the market. In controlled lab experiments, we were able to discharge the cells to 0 volts many times. However, we by no means encourage such practice, as mentioned in our FAQ. This feature is developed as a safety cushion, an insurance policy of sort. The whole point is that you no longer need to time your flight or use a low-voltage cut-off device to protect your batteries. You can fully, freely enjoy your flying experience until you feel your aircraft is losing power. We will modify our website to reflect this viewpoint.

The subject of low-voltage tolerance asides, I would like to point out that the performance of our batteries is in the upper echelon among comparable products in all aspects. This includes the 25C throughput, high capacity, low operating temperature, long life-cycle, and stable voltage throughout the discharge cycle. We do not claim our batteries are better than others, but we believe they are comparable to the best in the market. And I think our price is very reasonable.

Our battery does not withstand over-charging or punctures, nor is our battery indestructible. When you single out one strength of a particular product from a particular brand, it's easy to dismiss our products. All things considered however, I feel we offer a lot of bang for your bucks.

We are a new brand with a lot to prove. We do ask that you kindly give us a fair chance to prove it.

Thanks for listening, and happy flying.

Barry H.
04-27-2007 Over year old.
 
 
bstock
Senior Heliman
Location: Easton, MD.

Cool... Thanks for chimming in Barry... that answers allot.

Now let's see how they hold up over time (cycles). If they can deliver consistant power thru out their life cycle (and it is a long one)... I am sold, and will get a pack or two.
04-27-2007 Over year old.
HOMEPAGE  
 
 
martinic
Veteran
Location: NB, Canada

Thanks Barry - that is helpful.

The fact that these batteries hold voltage well and can be run down without damage to the point the heli cannot fly is simply amazing.

Although you have stated that the battery will not withstand overcharging, puncture or crushing (destructive, of course), it is really the saefty aspect that I am interested in. Although the battery will be destroyed under these conditions, will they burst, catch on fire and/or emit dangerous gases? (The new 30C Kokams apparently do not catch fire)

Calvin
04-27-2007 Over year old.
 
 
SBH
Heliman
Location: Coralville, IA - USA

Thanks for the kind words, folks.

Unfortunately, our cell can catch fire if charged to over 6 volts. Don't really know if it emit anything toxic though. We've never thought about studying it so ....

We are constantly tweaking with our formulation. What we've found so far is that capacity and fire safety do not go hand-in-hand. It's always one or the other. You probably see the same thing throughout the industry; those fire-safe packs are either heavier, or have lower capacity and C-rating. Our philosophy has always been leaning toward the capacity and performance. We are still working on it though and, who know, one day we may find the holly grail.

BH
04-27-2007 Over year old.
 
 
martinic
Veteran
Location: NB, Canada

Thank-you for your quick and detailed reply!

If it comes to a chocie between performance and safety, then performance would be my choice as long as it is manageable. From your reply, it certainly seems that you have considered this carefully and have made the proper choices.

It looks like you have an excellent product.
04-27-2007 Over year old.
 
 
Air_Alpheus
Veteran
Location: Trafford,PA - USA

21 cycles on the battery so far draining it to almost 6 volts on every flight and its still going strong. More info to come...

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
05-03-2007 Over year old.
HOMEPAGE  
 
 
MrMel
Elite Veteran
Location: Lidingo, Sweden

Ive recevied my 2s pack and I have started tests with the CBA so we can see the numbers in clear view.
05-03-2007 Over year old.
 
 
MrMel
Elite Veteran
Location: Lidingo, Sweden

Hit a snag with my testing software, so I cant post a full result yet, but ive pushed it 25C for a full run, down to 2.25 volt per cell, and it just ask for more!

Those packs really seems to be the real deal!
05-05-2007 Over year old.
 
 
SP4772
Senior Heliman
Location: Mirabel, Québec, Canada

New developments on that lipo?

WWJD??
05-12-2007 Over year old.
 
 
Air_Alpheus
Veteran
Location: Trafford,PA - USA

Should hit my 50th cycle this weekend Ill post in flight data of that flight. Battery is holding up very well, I over discharge it every flight and when I charge it back up it takes on average 2070 mah and still charging to 12.6 with a resting voltage of about 12.4.

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder
05-12-2007 Over year old.
HOMEPAGE  
 
 
SP4772
Senior Heliman
Location: Mirabel, Québec, Canada

Good news! Thanks...
I was just wondering if the lipo puffs, will the cie change it under warranty?

WWJD??
05-12-2007 Over year old.
 
 
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e-Electric Batteries & Chargers > Anyone Heard of these new Lipos Update # 4 Video Added
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