[NSRCA-discussion] True R/C packs/Zippy packs

[James Oddino]

Has anyone tried the 15C Zippy packs?  Are these the forerunners of  
what you are flying Don?  They look pretty good on paper.

Jim


On Mar 31, 2008, at 3:50 PM, atwooddon at aol.com wrote:

> Jim, I typically discharge around 3400 or less.  With the new P09  
> sequence, a full sequence only uses about 25-2700 mah.  I will admit  
> I have not 'babied' these packs initially.  If they were going to  
> puff or loose capacity early in their life I wanted to know. So,  
> after the first 5 easy flights, I started pushing them with 85-90%  
> discharges for about 10-15 flights.  They would get up around 120  
> degrees on a 90 degree day but they stayed in balance pretty well  
> and charged fine.  They held their capacity after a 4 month storage  
> at 50% discharge and kept in a cool workshop over the 'winter' here  
> in NorCal.
>
> Don
>
>
> -----Original Message-----
> From: James Oddino <joddino at socal.rr.com>
> To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
> Sent: Mon, 31 Mar 2008 10:52 am
> Subject: Re: [NSRCA-discussion] True R/C packs
>
> How deep are you discharging the 4100s?  I was thinking about some  
> 4500s to save weight but not sure how the cycle life would be  
> affected.  Once in awhile I'll fly some extra maneuvers and get up  
> in the 4000 mAh range.  I guess one would discipline himself better  
> if he didn't have the margin.
>
> Jim
>
>
> On Mar 31, 2008, at 8:39 AM, atwooddon at aol.com wrote:
>> That is one of the issues with these type packs.  You never know  
>> what the configuration is or what cells they may be using when you  
>> re-order.  To give credit where it is due, the 'name brand' packs  
>> can be replicated, you know what you are getting when you order a  
>> 'xyz 10s' configuration.  And you can probably order another one  
>> 6-12 months from now and get the same thing.
>>
>> Having said that, I too have been experimenting with 'generic'  
>> packs, so far with good luck.  My 'generic' 4100 pack has over 50  
>> cycles on it and going strong.  However, it has to reach over a 100  
>> cycles to reach break even cost with my 'name brand' packs which  
>> have well over 200 cycles each and still performing reasonable  
>> well.  Only time will tell.
>>
>> I know the prices have dropped even more since I bought my  
>> 'generic' pack late last summer so that cost ratio has probably  
>> shifted a little since then.
>>
>> Don
>>
>> In a message dated 3/31/2008 7:13:21 A.M. Pacific Daylight Time, cjm767driver at hotmail.com 
>>  writes:
>> I received my set of 5S 5000 batteries from True R/C and see that  
>> they
>> are different cells from that older set that I bought in the Fall.  
>> The
>> newer cells are about 5" in length vs slightly over 6" for the older
>> pack. The new ones look similar to the short Flight Power F3A  
>> packs. I
>> have an email to Dan at True R/C to get the scoop on the newer cell  
>> make
>> up but the point is that our observations about the True R/C packs  
>> were
>> based on the older cells and the new batteries may be better or  
>> worse -
>> we need to start all over and get data on these now.
>>
>> Chris
>>
>>
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