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Old Jul 01, 2012, 01:03 PM
Lloyd Robinson
fishboy77's Avatar
USA, MO, St Louis
Joined Jun 2007
777 Posts
I can't comment on longevity, but I just did a few static tests to see how well they hold voltage. I have two 4s 2200 35C Zippy Compact packs and compared them against a 4s 2200 25C Gens Ace. The ZC packs have about 5 cycles on them. I just bought the Gens Ace pack used. The seller said it had about 10 cycles on it. Anyway with a load of about 55 amps (25C) the ZC packs did just slightly better than the GA pack. That says a lot since the GA packs are well known to be excellent. The ZC packs are also about 20 grams lighter than the GA. I'm attaching the Eagle Tree file of the test. The first two packs are the ZCs. The last is the GA. Packs were charged in parallel to ensure that they all started with the same voltage.
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Old Jul 01, 2012, 01:13 PM
Registered User
United States, NJ, Clayton
Joined Aug 2010
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Quote:
Originally Posted by fishboy77 View Post
I can't comment on longevity, but I just did a few static tests to see how well they hold voltage. I have two 4s 2200 35C Zippy Compact packs and compared them against a 4s 2200 25C Gens Ace. The ZC packs have about 5 cycles on them. I just bought the Gens Ace pack used. The seller said it had about 10 cycles on it. Anyway with a load of about 55 amps (25C) the ZC packs did just slightly better than the GA pack. That says a lot since the GA packs are well known to be excellent. The ZC packs are also about 20 grams lighter than the GA. I'm attaching the Eagle Tree file of the test. The first two packs are the ZCs. The last is the GA. Packs were charged in parallel to ensure that they all started with the same voltage.
I dont have any graphs, but my 4s 2200 25c gens ace have more punch then my 4s 2200 25c zippy compacts, but I can feel a huge weight difference in the air, i am a 3d fixed wing flyer and the compacts fly way lighter, in my opinion they each have there advantages, we just need to see how they last.
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Old Jul 01, 2012, 02:11 PM
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Joined Mar 2007
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Thanks guys they sound promising then, but longevity is what I'm after, I'm currently running 14s 10,000 mah zippy 20c in a 37% plane and they are fine, hovers at half stick, but after a year are puffing. I'm looking at the 7s 5800 mah 25c packs should only be about 8 ounce additional weight gain but in theory should give me 90 more pulling amps and at least 1.5 more minute flights. So anyone have the larger packs with more then 50 cycles any reports?
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Old Jul 03, 2012, 09:08 PM
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Massachussets
Joined Nov 2005
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Just received two 5s 25C 5000 packs that I'm going to run as 10s in a pattern plane.

After first charge one pack had cell Irs between 3.0 and 3.2mohm and the other between 2.9-3.2 mohms at 68F as measured on .PL8. That puts them in the same range as Hyperion 25c 5000 and Rhino 20C 4900. Looks like they fall short of the Gens Ace 30C 5300 which run between 1.6-2.1 mohm per cell.

584g and 588 with Deans connectors.

Overall not bad. I'll report back after a full breakin.
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Last edited by wingster; Jul 03, 2012 at 09:11 PM. Reason: Forgot weights
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Old Jul 03, 2012, 10:50 PM
Frankenstein recycled packs
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USA, AZ, Gilbert
Joined Jan 2006
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wingster, check the IR after 10 cycles. It will go down. Also, pretty good for 67F IMO. My tests showed my 25C rated packs to be true 25C cells.

Rick
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Old Jul 10, 2012, 11:11 PM
Pro beginner
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Melbourne, Australia
Joined Aug 2010
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I bought 4 of the 2200 35C 3S Zippy Compacts. It's undergoing stress testing, and used for:
1. Protos 500 6S (2x3S) - Hover draw around 15A continuous, probably over 80-100A spikes
2. 58" Plank on 6S (2x3S) - Static WOT ~45A
3. 48" Foamie on 3s - Static WOT ~52A

Obviously the hottest application is the Protos.

Testing: Ambient around 8-12degC. Lipos pre-warmed to around 25degC

They come down about 25-30degC in the protos.

In the 58" plank testing,and my version of lightly pushing the pack reduces flight time from 12 mins to 8mins.Packs came down cooler than when it first started, something like 18-20degC.

In the 48" foamie, temps was the same as when it started, around 25degC.

Performance wise, not much different to TP 65C packs over the flight. Probably because I'm drawing no where near 30C continuous, which is where the TP would truly shine.

For my applications, I save over 36g for the Zippy Compacts over the TP packs in 6S.

I mark each cell with the no. of flights it has had on it, so we'll see what it looks like at 50 cycles. I consider a stressed flight to 3.8V per cell resting a full flight, as it has been exposed to high current draws. If you're interested I can post IRs from my PL8, which seems pretty accurate.

As everydayflyer has said, one brand may be good for one particular mAh and C and S size, and not necessarily at any other. So far, these are great and very light. At just under 180g including connectors, if these make it to 100 flights, they really are the best bang for buck and weight.
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Old Jul 28, 2012, 03:17 AM
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just got 4 of the 2200mah for a 4S upgrade on my 450 Sport. Basically identical in size to the 3S turnigys I was using previously and only about 18 grams heavier. I only have two complaints about them. A. The XT60 connector is ridiculously tight and extremely hard to separate and B. The heat shrink tubing used on the backs of the connectors is crap and will crack and fall off leaving an exposed terminal. The red used on the positive side is particularly susceptible being made out of some kind of brittle waxy plastic. Have some heat shrink tape ready. For the price I'm willing to accept it but if I was paying $25 a battery I'd be in Hulk mode over this.
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Old Jul 28, 2012, 07:40 AM
Canadian Bacon
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Kingston, Canada
Joined Jun 2004
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For the tight XT60 connectors, Take a pair of needle nose piers and go around the male pins and give them a little squeeze all the way around till you get them the way you like. If you get them too loose pull them out again with a jewelers screwdriver. Keep them fairly snug for a good connection. I do the same thing with the Deans by flattening the springs.

Gord.
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Old Jul 28, 2012, 08:32 AM
VOLTS > AMPS
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I believe its the plastic that's the tight fit. I've tried that method to no avail.
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Old Jul 28, 2012, 09:39 AM
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The plastic has no stifness i have adjusted the male pins until there's no contact and the plug just falls apart.
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Old Jul 29, 2012, 12:11 AM
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It was partly brand new connectors on both the batteries and ESC. I switched back to the old 40 amp plush (60 amp wasn't really needed and just added weight) and the plugs are much easier to separate now.
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Old Sep 21, 2012, 06:59 PM
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Massachussets
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Back in post# 79 I reported that I had two 5s 25c 5000 packs that measured between 3.0 and 3.3 mohms per cell at 68F. After 19 flights they are now measuring between 3.7-4.3mohms at 64F. They are holding up well and were recording lower readings this summer when my basement was warmer, but didn't fall much if at all below the initil readings of 3.0-3.3.
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Old Sep 24, 2012, 08:51 PM
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Had a tab break off a cell inside a 2200 25c on the ground during spoolup causing complete power failure.
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Last edited by Atomic Skull; Sep 25, 2012 at 02:39 PM.
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Old Sep 27, 2012, 12:53 AM
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Sydney, Australia
Joined Jul 2003
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ive got one flight on 2 packs 1500 4S in a jet drawing 37.5amps i dont know if its a coincidence or what but my C rating is also continuous 37.5amps? 25C zippy compacts
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Old Sep 27, 2012, 01:22 AM
222 km/hr Parkjet flyer
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Latvia / UK visits
Joined Jan 2010
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Months down the line ----- I'm buying more and more compacts instead of standard blue LiPo's ... I have completely given up on Nanotechs as well.

I'm now hoping that Compacts sizes will be more wide spread ... as some sizes I want are not catered for ... yet !

Nigel
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