Intellect 4200mah cells

[delanobe]

Hi,

I was wondering what are good numbers for matched Intellect WC battery after a charge??

Mah:
Peak voltage:
Temp:

Somebody has this info (I searched but couldn't find this info!)

Thanks

[Chequered Flag Racing]

Originally Posted by delanobe

I was wondering what are good numbers for matched Intellect WC battery after a charge??

Mah:
Peak voltage:
Temp:

no real hard & fast figures but i hope this helps

Mah: this varies according to charger used & age of batteries & how you low you balance them to. I go to 0.9v on a NST & see 4400+ mah going in.

Peak Voltage: again age of batteries counts 9.1v to 9.3v for good ones. Higher for batteries that are well used.

Temp: I charge to 45c, temp in batteries rises to about 52c when charge has stopped

[delanobe]

Hi,

I have the following numbers with my battery's so was wondering if it's any good?

Mah: 4480
Peak voltage: 9,180
TEMP: 45
Equalising to 0,9V

Thanks

[Chequered Flag Racing]

#'s look OK

which charger are you using?

[delanobe]

I'm using a Much More Ctx-C charger and a Novak smart tray Se.

[super__dan]

All looks good there, nothing to worry about at all. On my Millennium I got peak of 9.22 on a brand new pack of cells yesterday when trayed from 0.9v on a smart tray.

[Lee]

I can do 280 secs in 4wd with 8.75V in my cells as proven yesterday

[stegger]

Originally Posted by Lee

I can do 280 secs in 4wd with 8.75V in my cells as proven yesterday

Think it's time you got some NEW cells AND a NEW charger Lee

[delanobe]

The higher the peak the better or is the mah reading the most important?

Thanks

[MiCk B.]

Originally Posted by delanobe

The higher the peak the better or is the mah reading the most important?

Thanks

Higher the peak means more resistance in the pack : less voltage / punch on discharge.

Normally as packs get older the peak voltage goes up.

MiCk B. :-)

[delanobe]

So resistance is not good for a pack if I understand correctly?

I have 2 pack with the following numbers:

4380mah
48°
Peak 9,112

4320mah
47°
Peak 9,89

Wich on is the best?

Sorry for all the questions I'm a newbie who is learning!

[sosidge]

Don't get too hung up on charger readings. It is a very imprecise way of measuring pack performance and they change depending on the charger settings. Cells are matched on discharge, with calibrated industrial quality equipment for a reason!

While the Cell Master is a very good charger it is not something I would stake my life on when it came to cell readings!

It is fine to compare among your own packs over time though. If you notice that the packs are starting to take significantly less charge capacity after being equlaised, or if the peak voltage is significatly higher than if was before (and I don't mean a couple of thousandths of a volt), then it is probably an indication that the pack is past its best.

My first gen IB4200 cells are knackered now after nearly 2 years of use and misuse, charge capacity is down to 3500mAh on the Cell Master and peak voltages are way up in the 9.3V+ region. I can't even charge them at over 5A anymore otherwise they heat up a colossal amount.

Then again you will realise when a pack is past its best because your car will be slower!

Virtually all the fresh Intellect cells are pretty similar in performance (assuming it is not a dud), even the gap between the best matched cells and the worst is only a couple of percent.

Be confident that all your new packs are better now than they will ever be, and in real terms as good as the best packs anyone you will race against has.

[Col]

Originally Posted by sosidge

I can't even charge them at over 5A anymore otherwise they heat up a colossal amount.

Intellect recomend a max of 4.5amp charge. Overcharging is why they keep blowing up...

[dave p hall]

not best pleased with my 6 new packs 3 packs have 3 cells down in each,and 3 packs have a cell down in each tried charging duff cells at 1 amp individualy as suggested by mirage,but to no avail shouldn't have to do this in my opinion,brand new matched packs at end of the day. think these high capacity packs might be a backward's step at the momentany how sent them back to mirage.

[Lee]

If you have a duff cell seperate it from the pack and put it accross a 12v battery for a second to give it a kick up the arse, then put it in the pack , equalise and try again.

And stegger yes the futaba decided to stop working just before the final, thanks to dan/chris for the 600 seconds of charger usage

[Southwell]

Originally Posted by dave p hall

not best pleased with my 6 new packs 3 packs have 3 cells down in each,and 3 packs have a cell down in each tried charging duff cells at 1 amp individualy as suggested by mirage,but to no avail shouldn't have to do this in my opinion,brand new matched packs at end of the day. think these high capacity packs might be a backward's step at the momentany how sent them back to mirage.

You didn't overheat them when soldering or something like that? I have never heard of that many going down for one person in one go.

[Northy]

I had at least one cell in each of my last packs. It depends how long they've been sat on the shelf with these new super cells that self discharge like a rabbit with the shits

G

[bigred5765]

try the new east powers, there blomin ace
we just got some new TRINITY EP4200'S
ran them at southport omg im livin em

[josh_smaxx]

Originally Posted by bigred5765

try the new east powers, there blomin ace
we just got some new TRINITY EP4200'S
ran them at southport omg im livin em

Too right there, EP's rule!!!!!!!!!!!!

[Welshy40]

Originally Posted by Col

Intellect recomend a max of 4.5amp charge. Overcharging is why they keep blowing up...

Intellect does that mean IB4200?