[NSRCA-discussion] True R/C packs

[atwooddon at aol.com]

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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