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Old 03-22-2006, 03:34 AM   #46
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I thought that discharging them below 1V per cel wasn't the way to go for the IB4200's? I've heard you then will loose (30 sec.) runtime. Anyone have experiences with this?

[QUOTE=cannon]OK what is your problem with the maintenance method then? Can't get much simpler than discharging down to 5.4 volts after racing then equalising before next being charged.
QUOTE]
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Old 03-26-2006, 04:18 PM   #47
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If I were to build a stick pack with the new 4200nimh, How will you maintain it? I've already lost one IB3600 stick pack even without discharging it below 5.4v. They got damaged with overcharging I guess because I coudln't equalize it. The new cells are just not as durable to abuse.
BTW, the stick packs are used for my mo3 and f103 kit so I really need tips. I use side by side for other kits of course.
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Old 03-26-2006, 04:55 PM   #48
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Quote:
Originally Posted by Ben.C
The 3300s are really good...Very robust cells...But the newer 3700s are not a robust as the 3300s. I have one pack that vent after like that 4-5th charge.
That could've just just been a bad pack or had a bad cell or two in it. I've had the new and improved 3700's for months now without any hiccups.
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Old 03-26-2006, 05:06 PM   #49
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Quote:
Originally Posted by nino_pohan
My brother IB3600 matched have no power anymore (use only 20 cycle) and my friend IB3800 unmatch burn after charge with muchmore cell master. I have GP3300 SMC and i used 1 year (>50 cycle) and i charge on my pulsar is still have 3500mah without deadshort. GP is very good batteries.
My 1 year old GP3300s are dead in the water next to my new IB3800 packs, nowhere near the same amount of power. Some of them have maybe 10-15 cycles on them now, feel as good as my 2 cycle packs.
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Old 03-26-2006, 05:17 PM   #50
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[QUOTE=PeterCr]I thought that discharging them below 1V per cel wasn't the way to go for the IB4200's? I've heard you then will loose (30 sec.) runtime. Anyone have experiences with this?

Quote:
Originally Posted by cannon
OK what is your problem with the maintenance method then? Can't get much simpler than discharging down to 5.4 volts after racing then equalising before next being charged.
QUOTE]
Yes that has been my experience with any of the IB cells (not that they're not any good) but...they're too temperamental to equalizing past .5V per cell. I've always liked and have had anything but positive results when equalizing any of my GP's to 0V/cell before charging.
If it really doesn't matter at what voltage you equalize to (as some folks have been known to claim) why don't you see people equalizing to like 1.2V/cell before charging?
The more mah you take out the more the cells take in each and every time. In any set of cells the most important things are the charge and discharge curves (of each cell) vs. IR. Remember you're pack is only as good as your weakest cell. However, the farther back/left on the discharge curve you are the better. This means that in a race you have more available voltage (punch) at any point of the race than the next guy. But this is where IR is primarily important- IR determines how much of that power is going to be available.
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Old 03-27-2006, 09:01 AM   #51
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Some questions for the battery guru's:
- In europe we see LRP V-Tec cells. I've been told these are IB cells. Are they?

- I owned 2 packs of 3800's pusehed and matched by a german matcher, and they died on me after about 10 runs. I trayed them (Trinity RealTime 2.5) after every run, never ran them more than 2 times a day, never let em sit more than a week without a run on them, always charged em linear @5A with lowest delta peak setting on my Novak millenium. After +/- 20 runs they only took 3300mAh's and were slow like old 1200 packs.
Do the new 4200's from IB and the new 4300's from GP hold up better?
Most first series packs will now have quite some runs under their belts!
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Old 03-27-2006, 09:39 AM   #52
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Yeah, LRP cells are from IB.
I think the trinity realtime 2.5 has no cut-off(I think), it take the cells down to 0V, that will kill IB cell. Don't discharge IB cells pass 0.9V per cell(EA motorsport said it is ok to 0.7V).
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Old 03-27-2006, 12:47 PM   #53
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the realtime sports diodes, keeping voltage at about 0.7V
I always watch that I disconnected the batteries when the lights went out
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Old 03-28-2006, 01:28 AM   #54
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The Realtime 2.5 does not have a cutoff, it will discharge to 0 volts.
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Old 03-28-2006, 02:02 AM   #55
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Hi Mathijs.
I think you're problem/was that the series of the 3800's you had were not really strong. In the beginning of the first 3800's series IB had some problems with the lifetime and venting.
Now the problem is solved with all the new series of 3800's and 4200's.

But remind, we made some intense testing on the IB's. Please do not discharge them bellow 0,7-0,8 volts, this will destroy the capacity of the cells. It does not take influence on the voltage, but runtime will be killed big time.
Our experience is a loss of 30-40 seconds!!

Also we made some tests on the GP 4300, but I do not want to start any discussion here again. Makes no sense, customers will make their choice!

Hope to see you soon Mathijs,
Markus
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Old 03-28-2006, 02:04 AM   #56
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This is a GP vs IB thread, so please posts those results
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Old 03-28-2006, 07:14 AM   #57
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Quote:
Originally Posted by vassago
The Realtime 2.5 does not have a cutoff, it will discharge to 0 volts.
after reading the replies, i sent an email to trinity support and this is their reply:

"It will eventually discharge to Zero. When the lights go out thats
about .8
per cell

support"

so.. the pain is watching the discharger till the lights go out. sorry.. kinda off topic, just wanted to share.
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Old 03-28-2006, 09:30 AM   #58
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OK, so I discharged them the right way: till the lights went out.
Looks like it was just a useless batch of cells.
However, I'll get some 3700GP's for my new race packs. I don't really care about the last bit of runtime and millvolt, but do care about long-living -easy to work with- cells.
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Old 03-28-2006, 09:46 AM   #59
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Quote:
Originally Posted by sup
after reading the replies, i sent an email to trinity support and this is their reply:

"It will eventually discharge to Zero. When the lights go out thats
about .8
per cell

support"

so.. the pain is watching the discharger till the lights go out. sorry.. kinda off topic, just wanted to share.

Tekin Battery Doctor = problem solved and for $50 it can discharge 2, 4 cell packs
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