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T-REX 450 › Air Thunder hammering on a 450F motor
08-08-2007 10:08 PM  10 years agoPost 21
Pyrock

rrKey Veteran

SF Bay Area

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As someone stated, these packs are being drained to the point that the heli would fall out of the sky and they still dont puff and are going strong. Imagine if you use them to...say...90% instead of 80% like the other major brands. That would be enough for me to buy them. Regardless of the successful test results, if I spent $266 for a 6S pack, I would NOT fly them until the heli falls out of the ski...I would use them to 90% or when loss of power is first detected. It's just not good practice to abuse a $266 lipo let alone your Heli which is most likely worth thousands of $. Also, you dont have to invest the $ and weight in a low voltage alarm. I'm sold and as soon as I get the $$, I am going to get a custom 6S2P 4400mah Air Thunder pack for my Stretched Logo 10.

Trex 500, Stretched Logo 10 3D, Ion-X, Gaui 200

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08-08-2007 11:18 PM  10 years agoPost 22
bilbo

rrVeteran

Boston, MA - USA

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It's just not good practice to abuse a $266 lipo let alone your Heli which is most likely worth thousands of $
The latter point makes sense to me. I have four of the 3S AirThunder packs for my Trex 450, but I don't run them all the way down. I have run once until the ESC lowered power at 9V just to test it, but normally I land well before that because I like having full power for the whole flight. I have almost crashed because I did a flip down low only to have the head speed drop drastically because my battery was lower than I expected, so that's reason enough for me to follow the 80% rule even with these batteries.

I still think it's better though to have batteries which aren't going to be ruined just because you accidentally run them too low. I suspect that within the next few years all lipos will be manufactured this way, and people will consider it a flaw for a lipo to be ruined just from running it down low.

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08-09-2007 07:24 AM  10 years agoPost 23
hotgluedheli

rrApprentice

USA

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Does anyone know why AT batteries are so much better at overdischarge tolerance? It sounds like a major breakthrough in lipo battery technology. I guess its a trade secret but I hope all lipos will eventually be made like this. Anyone have any idea? For now I'm sticking with a123 since I don't have to worry about damaging them from over discharge and can't beat the 15 min charge time

I crash therefore I am

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08-09-2007 04:24 PM  10 years agoPost 24
Air_Alpheus

rrVeteran

Warrenton. VA

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Does anyone know why AT batteries are so much better at overdischarge tolerance? It sounds like a major breakthrough in lipo battery technology. I guess its a trade secret but I hope all lipos will eventually be made like this. Anyone have any idea? For now I'm sticking with a123 since I don't have to worry about damaging them from over discharge and can't beat the 15 min charge time
The batteries were originally designed for use in laptop computers,PDA's and other non R/C related electronics, until recently the technology was morphed into the cells that are used in R/C...

Its What I dont Say You Should Be Worried About...
Bruce A Aunkst III
Team AirThunder

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