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Old 04-15-2005, 02:39 AM   #16
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Post ICS hooked up...

-JB
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Old 04-15-2005, 03:30 AM   #17
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Spintec - Battery manager


www.spintec.nl
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Old 04-15-2005, 03:45 AM   #18
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homemade

http://www.rcpics.net/view_single.php?medid=54402


-constant current adjustable from 15 to 30A

-adjustable cutoff

-powered by a 9volt battery that lasts months at a time.
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Old 04-15-2005, 03:48 AM   #19
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I use my Integy 16X9 at 20 amps and then finish then off on a Novak tray.

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Old 04-15-2005, 03:48 AM   #20
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Quote:
Originally posted by kufman
homemade

http://www.rcpics.net/view_single.php?medid=54402


-constant current adjustable from 15 to 30A

-adjustable cutoff

-powered by a 9volt battery that lasts months at a time.
Very interesting. How large is it?
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Old 04-15-2005, 04:14 AM   #21
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I used an old Rivergate 30A powersupply case for it. about 6"x6.5"x4.25. it could be smaller if I had used a real heatsink, but this is what I had at the time.
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Old 04-15-2005, 04:28 AM   #22
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Quote:
Originally posted by Ronald B
Spintec - Battery manager


www.spintec.nl
Best discharger out there................
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Old 04-15-2005, 06:29 AM   #23
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Default Spintec

Who in the US carries Spintec and how much is it?
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Old 04-15-2005, 07:18 AM   #24
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The Indi REACTOR 30 by integy is what i use. Works Great
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Old 04-15-2005, 07:34 AM   #25
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Quote:
Originally posted by raving-monkey
when deadshorting packs you are decreasing the internal resistance...therefore allowing more voltage to go into the pack.

but because there isn't as much IR....the pack can't store as much mah so less runtime
I had some year old packs that had never been deadshorted that were pretty much crap. I cycled them to get the #'s then deadshorted them. I cycled them a couple of days later and the Internal resistance went down, voltage went up, and runtime increased as well. Every old pack that I've deadshorted has had increases in runtime and voltage with a decrease in internal resistance.
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Old 04-15-2005, 07:47 AM   #26
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Integy Zero 30 it discharges each cell at 30amps and it take them down very rapidly....Takes like one-two minutea after you race to take them all down to .9v per cell but if you leave them it can take them down to 0.0 without cell damage. I put in until lights go out then in a battery box.
If it more than a week till the next charge I tend to not discharge them at all and leave that little bit left in the pack.
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Old 04-15-2005, 07:54 AM   #27
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........

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Old 04-15-2005, 08:08 AM   #28
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Spintec Battery Manager and equalized with NOSRAM Gravity board after that.
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Old 04-15-2005, 08:40 AM   #29
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Quote:
Originally posted by Matt Howard
I had some year old packs that had never been deadshorted that were pretty much crap. I cycled them to get the #'s then deadshorted them. I cycled them a couple of days later and the Internal resistance went down, voltage went up, and runtime increased as well. Every old pack that I've deadshorted has had increases in runtime and voltage with a decrease in internal resistance.
interesting...what i said was coming from a system control engineer but....i guess its what the chargers tell us is what really happens
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Old 04-15-2005, 10:26 AM   #30
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Like Matt said, this is with OLD packs though and those increases could have been minimal. ALL old packs that I've deadshorted have had 'minimal' increases, nothing to do backflips about. A practice pack is a practice pack. There is still no PROVEN method out there that works better than equalizing down to 0.0V, 'holding' them there for at least 4-6 hours before you charge them again. I have computer data that shows even if your cells read 0V, there is still some voltage left in the cells. The only way to ensure your cells have no voltage left in them, is having a voltmeter that can measure less than a quarter of a volt. All the 0.0V discharge trays do this (not the measuring part but truly taking the cells to 0.0V) but you have to leave them on for awhile. The ICS unit that ProTrak makes is an awesome piece. If anyone wants to hear how it works that's fine but I'm not going to get into @ this point in time. I'm turning into such a battery geek; but this battery crap is fun -JB
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