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Old Jan 23, 2009, 07:29 PM
Southern Pride
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Haralson County GA. USA
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Yet Another LiPoly comparison SMC 40C TP Pro Power 30 TP Pro Lite V2 (20C)

Recently I was contacted and asked if I would be interested in testing some LiPolys. One small problem they did not have a cell size I was interested in so they said no problem we will have some made.
OK remember this is a sample pack made from sample cells. It may or may not be compariable to a mass production run.
<Edited weight>
For all intent and purposes it is the same size as a Thunder Power ProLite V
2 3300 and weighs approx.0.17 oz. per cell more ..

A SMC 40C 4S 3300 is 12.69 oz. 1.150" thick / 1.800" wide / 5.400" long
---




Added comparison graph and photo of CBA II setup.

01-25-09 Added another comparison graph.
Notes on lines were matching colors but when I deleted a test the discharge lines changed colors however the notes matching the curves stayed the same. Yet another bug in the CBA II firm / software that went undetetected by beta testers.

1-26-09 Added another graph 4-18 cyle 11-14 were flights.

LVC is being reduced to 9.0 volts (3.0 per cell) starting with Dsc# 19.

01-27-09 Dsc. 19-29 to 9.0 LVC graph

More graphs(?) post #17.


7-09 40C 3S 3300 last legs

http://www.rcgroups.com/forums/showp...3&postcount=43


7-12-09 See http://www.rcgroups.com/forums/showt...7#post12643457

for final graph of 40C 3S 2200


Charles
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Last edited by everydayflyer; Jul 12, 2009 at 02:38 PM. Reason: Added TPs to title
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Old Jan 23, 2009, 08:48 PM
Registered User
So. Cal.
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Looks like it has some serious 'stones'. Voltage under load at better than 20C is among the highest I've ever seen. What kind of termination temps we looking at?

Mark
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Old Jan 24, 2009, 07:26 AM
Southern Pride
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Haralson County GA. USA
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Start of 30A Dsc. 72F / End 99F
50A Start 77F / End 110F
70A Start 70F / end 115F

Some other points of interest?

All charges at 5@ (approx. 1.5C) ,charge times 38 to 42 min.
Reported by FMA Cell Pro 10
Cell IR first charge 3.8 / 3.7 / 3.8
Charge #4 2.9 / 2.7 / 2.5 battery at 75F

Hyperion 720i Charge #2 IR 6 mOhms /charge #7 5 mOhms.
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Old Jan 24, 2009, 10:46 AM
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So. Cal.
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Very very impressive. Looks like CV portion of charge cycle was basically non-existent owing to the insanely low IR. Would have me considering purchasing more lipolys for my high performance birds. Next I'd like to see a 20C curve at 1 year / 200 cycles.

Mark
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Old Jan 24, 2009, 11:46 AM
ProgressiveRC
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Seattle, WA
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Agreed, best results I have seen. Impressive voltage under load and low temps = good cells. 40C, eh?
Quote:
Originally Posted by everydayflyer
...the same size as a Thunder Power ProLite V
2 3300 and weighs approx. 1 oz. more. Do not get confused here ProLite V2 is only rated 20C , TP ProLite 30C on graph is only 2250 mAH...
Although, I must admit you lost me here.

- David
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Old Jan 24, 2009, 01:24 PM
Southern Pride
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Haralson County GA. USA
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I was pointing out that the cells are the same size as TP ProLiteV2 3300 rated 20C ones and that the wieght of these 40C rated cells is just slightly more (about 1/4 oz per cell more.)

Reference to TP ProLite 30C on graph is only 2250 mAH... covered by this sentance

Quote:
What Pro lite on the graph you ask? WellI am waiting to post it after comments.
Meaning I intend to post a graph of the 30C Prolite30C and this 40C at the same discharge rates in C. One is only 2250 mAh and the other is 3300 but both will be compared at approx. 18C so the first part of the graph should be a fair comparison.

Charles
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Old Jan 24, 2009, 01:41 PM
ProgressiveRC
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Seattle, WA
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Ah, great - thanks for explaining. Lost me in the shorthand, but now it makes perfect sense.

I look forward to the results and comparison, for what it's worth I just finished running some tests on Zippy cells, not so much for their results, but for a base of comparison. Needless to say, voltage is much lower under load than these cells - can you list the exact weight of the pack or cell in question here?

- David
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Old Jan 24, 2009, 01:54 PM
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Quote:
Originally Posted by write2dgray
Ah, great - thanks for explaining. Lost me in the shorthand, but now it makes perfect sense.

I look forward to the results and comparison, for what it's worth I just finished running some tests on Zippy cells, not so much for their results, but for a base of comparison. Needless to say, voltage is much lower under load than these cells - can you list the exact weight of the pack or cell in question here?

- David
Do you fly 4S/3300 ? You can email me or PM and I can let you try a pack of 3300/40C+ always looking for feedback.
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Old Jan 24, 2009, 02:08 PM
Southern Pride
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Haralson County GA. USA
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Quote:
can you list the exact weight of the pack or cell in question here?
4S is 12.69 oz. 1.150" thick / 1.800" wide / 5.400" long


Charles
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Old Jan 24, 2009, 04:15 PM
ProgressiveRC
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Quote:
Originally Posted by Danny/SMC
Do you fly 4S/3300 ? You can email me or PM and I can let you try a pack of 3300/40C+ always looking for feedback.
Most of the packs I fly are 3S 2200 size, for 450 helis, although I have been thinking of building a 500 size. I do a lot of testing though, and would be interested in pushing these 40C cells as well if there is opportunity.

Cheers,
David
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Old Jan 24, 2009, 04:47 PM
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Quote:
Originally Posted by write2dgray
Most of the packs I fly are 3S 2200 size, for 450 helis, although I have been thinking of building a 500 size. I do a lot of testing though, and would be interested in pushing these 40C cells as well if there is opportunity.

Cheers,
David
I have their 25C 3S 2200's and they are great. I have not found anything with as much power. I can't imagine 40C!
Like I said in another post....remember this company! You will be hearing a LOT more from them.
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Old Jan 25, 2009, 08:46 AM
Southern Pride
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Haralson County GA. USA
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I have added a couple of comparison graph to the first post.

It is really sad that many do not really understand how to read a CBA discharge graph as they can be extremely revealing when it comes down to showing real performance of batteries and with a little searching through past files and overlaying a great deal can be learned.

Comparing the TP ProLite V2 (20c) and the SMC 40C at 40A shows that the V2 has a slight advantage . You should also consider that the V2 is approx. 1/8" thinner and 0.74 oz. lighter ( for a 4S) . I doubt that this makes much difference in aircraft these would be used in but some place a premium on weight savings.

One should also consider that while the 40A discharge rate only equals a 12C discharge rate for each it also represents only a 4.5 minute flight. In aircraft I fly these in a 7 min. flight is a lot closer to average flight times assuming both were 4S.

Where does this leave us? Well making honest,unbiased comparisons of LiPolys is extremely difficult. One of the most asked questions here on RC Groups is which is the best LiPoly? My simple answer is there is no clear cut best , just as there is no clear cut best charger,motor,ESC, aircraft etc. There are many facts which must be weighed and then with some luck you end up with what works well for you.

Charles
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Old Jan 25, 2009, 07:01 PM
Southern Pride
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First flight impressions. GP ElectroStik,Scorpion 3020-12,APC12X8E.

7 flights this afternoon , 4 with 3S SMC 40C 3300 / 14 cycles, 1 with 3S OutRage XP 25 (44 cyles) , 1 with Thunder Power Pro pwer 30C 3S 2250 (two in parallel 4500 / 22 flights) and 1 with Thunder Power ProLite 2V 4S 3300 / 15 flights.

I have 273 flights on this plane so I feel I have a good feel for its' performance. I have flown it with 3S and 4S LiPolys and 4S and 5S A123s.

Performance with the 3S 3300 SMC was better than with the Outrage 3S XP25 which is 4 months old and has 33 more cycles on it. The TP Pro Power 30Cs in parallel were the strongest of the 3S batteries flown but not by much.Needless to say the TP ProLiteV2 4S was the clear power winner.

Charles
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Old Jan 27, 2009, 08:57 AM
Southern Pride
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Another graph added to post #1 . This one with dsicharges 19-29 with LVC of 9.0V (3.0 per cell) along with some comments.


Charles
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Old Jan 27, 2009, 09:59 AM
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everydayflyer, I for one , only see lines on a graph . I guess someone should do a video on how to read these things?
In one of your post, you say the TP 20C was a little better then the other battery at 40C . What I read into that is the other 40C battery is only half as good at it real C ratings?
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