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Old 08-22-2005, 06:27 PM   #1
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Default charging question

when charging a GP3300 6 cell @ 6 amps what should the mah be at the time of peak

i know there are prob. 100's of variables

but can someone give me some ballpark #'s???

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Old 08-22-2005, 06:32 PM   #2
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3699mah
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Old 08-22-2005, 07:47 PM   #3
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hey chris,

my 1.18v and 1.175v peaks out around 3600~3750mah
with 6A of charge at 18mv delta.

get your butt down in wed. nascar racing man~

Ming
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Old 08-22-2005, 07:53 PM   #4
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KEEP IT IN THE MIDDLE MING!!!

i think i might make it out this wed. nite

late,
Chris
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Old 08-22-2005, 08:26 PM   #5
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Quote:
Originally Posted by Chris08527
when charging a GP3300 6 cell @ 6 amps what should the mah be at the time of peak

i know there are prob. 100's of variables

but can someone give me some ballpark #'s???

Chris08527
If I deadshort or just tray them before the charge, they usually peak in the mid 3800's to high 3900's.
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Old 08-22-2005, 08:36 PM   #6
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Right on My deadshorted packs are in the 3800-4200 range and peak voltage around 9.05 avg with .03 det.
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Old 08-22-2005, 09:53 PM   #7
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its going to depend on what charger you using and what delta peak settings you running.

I use a Quasar pro 6amps 50mv and my 3300s are about 2 years old i get 2900 to 3200 from my 4 packs. These packs are still very potent on the track( i run stock motors)

ITs tuff to compare one charger to another but you should be able to get between 3000-3600 from the sounds of things here. I typically ignor MAH rating from most chargers and pay more attention to charge time and discharge time. There more accurate ways of monitoring charge and discharge
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Old 08-23-2005, 03:13 AM   #8
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Quote:
Originally Posted by Joel Lagace
its going to depend on what charger you using and what delta peak settings you running.
Temperatures, number of charges that particular day and especially discharge state, also plays a role.
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Old 09-14-2005, 07:29 AM   #9
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i got a relatively new gp3300 stick pack... i have cycled them about 5 times now and can only get 3480-3500mah ....

i got a no name 3300mah sport pack that goes to 3700mah

gp3300 aint all that its cracked up to be....
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Old 09-14-2005, 07:55 AM   #10
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Quote:
Originally Posted by qwerty
i got a relatively new gp3300 stick pack... i have cycled them about 5 times now and can only get 3480-3500mah ....

i got a no name 3300mah sport pack that goes to 3700mah

gp3300 aint all that its cracked up to be....
Wadda ya mean you can only get 3500 out of a stick pack, a stick pack will only get worse as you use it more because the cells get very unequalized

As for that no name pack, whats your delta peak above 10mv/c im guessing, my GP 3300 are peaked at 5 sheerly coz their old farts and take 3400 wich im hapy with

BTW, the GP3300 era is over, have u heard of IB 3600 & 3800 and GP 3700, the 3300 is still good, but i bet ure cells are thrashed, where do u race maybe we could put your cells on my CDR-5000 and get a IR Reading, LOL\
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Old 09-14-2005, 08:22 AM   #11
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Quote:
Originally Posted by DIMO
Wadda ya mean you can only get 3500 out of a stick pack, a stick pack will only get worse as you use it more because the cells get very unequalized

As for that no name pack, whats your delta peak above 10mv/c im guessing, my GP 3300 are peaked at 5 sheerly coz their old farts and take 3400 wich im hapy with

BTW, the GP3300 era is over, have u heard of IB 3600 & 3800 and GP 3700, the 3300 is still good, but i bet ure cells are thrashed, where do u race maybe we could put your cells on my CDR-5000 and get a IR Reading, LOL\

it only charges to 3500 and it peaks.... i not sure what delta peak is, i am using a multiplex ln 5014 charger

like i said its only a new pack and only been cycle about 5 times so far... whereas a have a much older 3300 sport pack that charges up to 3700 thats been used about 10 times as much
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Old 09-14-2005, 10:00 AM   #12
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Quote:
Originally Posted by aoizip
hey chris,

my 1.18v and 1.175v peaks out around 3600~3750mah
with 6A of charge at 18mv delta.

get your butt down in wed. nascar racing man~

Ming

my batteries are about 8 months old..i have lrp comp charger, what should my delta be ?????? and what is that for ???? i run gp3300's
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Old 09-14-2005, 08:38 PM   #13
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Quote:
Originally Posted by qwerty
it only charges to 3500 and it peaks.... i not sure what delta peak is, i am using a multiplex ln 5014 charger

like i said its only a new pack and only been cycle about 5 times so far... whereas a have a much older 3300 sport pack that charges up to 3700 thats been used about 10 times as much


Dont get overly conserned about the MAH read outs if you read my post above and coles you'll see why.

The important thing is that the batteries are charging up for about the same length of time. About 40minutes at 5-6amps. IF your charger has a timer this is what you should pay attention to. The mah rating is not an indication of the batteries performance. Discharge average voltage and discharge time is most important. Low IR as well. You go to the track and start asking guys what MAH ratings they get and you will hear all sorts of different answers. Mine get low MAH read outs on my quasar yet smoke guys packs that get higher MAH read outs...
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Old 09-20-2005, 12:59 PM   #14
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If you carefully graph voltage as you are charging, you will see a point at which the voltage stops going up, it plateaus or even loses a tenth,
at the very same time you will start seeing the temp rise sharply
Essentially the battery is "full" and the additional amps are being turned into heat. When the battery is at about 120 degrees F plus or minus 10 degrees is when you should pull the charging wires off the pack.

The delta 10mv sttings, and the expensive chargers, and the peak detect programs onlyreal advantage over a solid 6 amp charger a voltmeter and a thermometer, is the fact that they are automatic(you do not have to be there to stop the charging)
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Old 09-23-2005, 08:07 PM   #15
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Quote:
Originally Posted by ChadCapece
If I deadshort or just tray them before the charge, they usually peak in the mid 3800's to high 3900's.
How is that possible? Deadshorting decreases runtime which is basically mah

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