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Old 10-31-2007, 01:58 PM   #1
Finless
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Default 3 Batterys Tested and Evaluated

OK so I was asked to test a Kong Power battery from Readyheli and decided the best way to do this was to compare them to two other batteries with a head to head comparison.

So this is my evaluation of three batteries
Kong Power 2200
FlightPower Evo25 2170
Thunder Power Extreme V2


All three packs were brand new and got 4 break in flights followed by 15 flights each. This evaluation will show all 3 batteries on the bench with weights and then after the 15 flights each, a EagleTree recording of each battery in a straight 5 minute hover. I choose the hover test with the EagleTree over 3D flight because it gives a apples to apples reading. Not every 3D flight is identical on collective management and what the pilot may do in the flight. Thus a straight hover flight is the best way to compare performance in my opinion.

So first up is a on the bench comparison showing differences in size and weight along with how they look on the heli.
Video Link ->3 Batteries Compared on the Bench (28 Megs)

Next up is in the field showing each battery mounted with EagleTree followed by post flight resting cell voltage measurement. Then a overview and analysis of the EagleTree recordings from each battery.
Video Link ->3 Batteries Compared with EagleTree recording analysis (46 Megs)

OK so there is my first Eval after each pack got 15 flights each. I am not done with this Eval as longevity is a key factor when buying batteries! Batteries these days tend to perform pretty much the same out of the starting gate thus getting the best bang for you buck is the deciding factor. So I will continue this eval with a data recording at 50 flights on each pack, then 100. Stay tuned.

Bob

PS below are the FDR graphs.
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Old 10-31-2007, 02:49 PM   #2
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Bob:

good stuff. thank you very much for your time, and effort in this bipartisan review.

like i said before, nice work.
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Old 10-31-2007, 05:26 PM   #3
hillar73
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Really cool. I would have liked to also see the Air Thunder 2200 battery, preety similar to the Kong Power.

Looking forward to the 50 flight test.
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Old 10-31-2007, 05:51 PM   #4
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Cool comparison Bob. Looking forward to following along.
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Old 11-01-2007, 10:15 AM   #5
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This is great, so when you do your comparision at 50 flights we will be able to get a clear indication as to which one is value for money, are the warranty the same?

Any test on the 6s packs too

Thanks

Robert
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Old 11-01-2007, 10:32 AM   #6
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I am anxious to see the tests around 75-100 flights. I keep logs with all of my lipo cycles for each battery and the majority of them started losing power or a cell started going bad around 75-100 cycles.

Thanks for the review Bob

Have you had a chance to re-test the FP pack to see if you have the same higher voltage as the first test?
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Old 01-29-2008, 11:32 PM   #7
EVO76
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Thanks Finless for the info!

I was reading somewhere the Kong packs are built differently from the others, something like an additional inner layer that helps the puffing??

have you noted this?

Jeff
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Old 02-13-2008, 01:06 AM   #8
Tim Smith
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Default NEW FLight Power EVO 25 c WOW

Quote:
Originally Posted by Finless View Post
OK so I was asked to test a Kong Power battery from Readyheli and decided the best way to do this was to compare them to two other batteries with a head to head comparison.

So this is my evaluation of three batteries
Kong Power 2200
FlightPower Evo25 2170
Thunder Power Extreme V2


All three packs were brand new and got 4 break in flights followed by 15 flights each. This evaluation will show all 3 batteries on the bench with weights and then after the 15 flights each, a EagleTree recording of each battery in a straight 5 minute hover. I choose the hover test with the EagleTree over 3D flight because it gives a apples to apples reading. Not every 3D flight is identical on collective management and what the pilot may do in the flight. Thus a straight hover flight is the best way to compare performance in my opinion.

So first up is a on the bench comparison showing differences in size and weight along with how they look on the heli.
Video Link ->3 Batteries Compared on the Bench (28 Megs)

Next up is in the field showing each battery mounted with EagleTree followed by post flight resting cell voltage measurement. Then a overview and analysis of the EagleTree recordings from each battery.
Video Link ->3 Batteries Compared with EagleTree recording analysis (46 Megs)

OK so there is my first Eval after each pack got 15 flights each. I am not done with this Eval as longevity is a key factor when buying batteries! Batteries these days tend to perform pretty much the same out of the starting gate thus getting the best bang for you buck is the deciding factor. So I will continue this eval with a data recording at 50 flights on each pack, then 100. Stay tuned.

Bob

PS below are the FDR graphs.
Well I found out the hard way that the equnox Balancer Used in quick balance mode will ruin your batterie DO NOT Balance with this unit
5 Batteries later .....I went today and Bought a btand new ALign chatger Balancer
2 bills but worth it and a New EVO 2 25c 2170 mha 11.1 v 3s blipo
Now why don't other compnaies make batteries this strong?
First charge Full to end chrg cycle.12.60 v
Hovered for 14 min landed removed the battery put it on the chatger and there was still 11.43 volts and I did not even hit the low voltage cut off on my Align ESC
I am Happy with this battery ,I am still way bummed about my 400.0 worth of batteries that the Equninox ruined.I did speak with customer support at hobbico today and they told me to send them the Equinox and if they find any thing wrong with it they with replace it.I said will you replace my batteries too? He said we will wait and see if the equinox is bad.
So I told him about the EVO2 FLight power batty and it preformance and said I would rather have my money back and Invest it in the FLight Power Batteries Thank you

These batteries Rock and keep you in the air with smooth FULL strength power NO Bull Crap here Guy these Batteries are worth Buying
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Old 02-13-2008, 08:38 AM   #9
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14 mins

I am lucky to get 1/3rd of that
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Old 02-13-2008, 09:05 AM   #10
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Can I try those solor panel blades you got on that thing
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Old 02-13-2008, 11:30 AM   #11
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Default Yep the Veyr first Flight

Well being that I am new at this .And aslo being that I have had my battery drama play out for so long that I eventually learned ( By going back thru my Heli and Radio set up SO Many Times and Listening to Bob and watching his Videos over and over to see if I messed up somthing .I have a very very tame set up.
I have only been hovering ONLY . I have never really been in forward flight yet ,except on G4.I can hover in the wind the breez clam tail in sidways both of em. Because I am a newbbi and I did not want to kill my new Heli's......... All I know is bob said Flight power25c
Now I see what bob mean's . Bob 's my hero
I am recovering from three Major spinal surgies I had last year .I don't have a job any more.So I took up helis after going to find a RC car to play with for something to do.
I saw My first RC heli the 3dx450 se fell in love and that was nov 07.
all I do is spend all day with them goofing tinkering and its always been a battery issue form the beinging for me. My longest flight was say 1 1/2 min till yesterday .
Now I am really hooked Wow what a nice hobby we have.
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Old 02-13-2008, 01:33 PM   #12
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Quote:
Originally Posted by Tim Smith View Post
...
all I do is spend all day with them goofing tinkering and its always been a battery issue form the beinging for me. My longest flight was say 1 1/2 min till yesterday .
Just be carefull or you will continuie to have lipo problems. Most people reccomend short flights for the first 5-10 hovers with a new lipo to break it in. Although I have heard of 14 minute flight times, these are 1 in 10,000 and in all of the setups I have owned or tried, I haven't been able to get anywhere near this much time. The majority of us get between 5-8 minutes. With very low curves and just hovering I could barely stretch 9 mins out of a very free running setup while staying within the 80% discharge rule. Just watch your temps, check your MAH when charging and go easy on the lipos. The easier you are on them, the longer they last.
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Old 02-13-2008, 11:31 AM   #13
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get a Flight power battery for your heli make sure its got the right adapter for your charger and Woot Woot HELI UP
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Old 03-21-2008, 08:55 AM   #14
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Default Anomoly?

I don't know nothing about nothing, but I'd like to see a retest just to see if the "anomoly" is consistant.
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