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Old 12-26-2003, 02:01 AM   #1
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Default Batteries & Numbers

Hi all, I got the new Integy 16x9v6 charger for Christmas and some 3300 Pro-Match packs... I just built and and charged one of the packs and the charger took the mAh capacity all the way to 4030! Is this normal? I don't understand, how does a 3300 pack push out 4030mAh? Also, there are other numbers on the charger for the batteries but I don't know what they mean... Is a 35 IR good for the pack? Also, what should I set cut-off on these things? Man, I've got a lot to learn!

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Old 12-26-2003, 02:05 AM   #2
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when i charge up my 3300GP mine usally go up to around 3900.
so i think its normal.
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Old 12-26-2003, 09:36 AM   #3
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3300's should not charge to more than around 3600. Check the threshold setting, it should be about 3mv. And ir stands for internal resistance. I believe 35 ir is pretty bad, but i dont have much experience with matched packs.
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Old 12-26-2003, 10:38 AM   #4
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Yesterday I charged a new zx 1.158v pack (3 ir) on my 16x9v5. 6 amps, 3mv cut-off, it peaked at 3616mah in 36 min 31 sec. You probabely have your mv cut-off too high. Mine came off pretty warm but they weren't even close to how hot my nicd's usually come off. How hot were our cells off the charger?
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Old 12-26-2003, 10:43 AM   #5
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you batteries, depending on your voltage threshold, will normally charge a good amount beyond thier rating, this is because they are rated on their capacity on discharge. as long as your cells come off the charge medium warm you should be fine.
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Old 12-26-2003, 10:52 AM   #6
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I use a CE Turbo 35 BL Stealth, and my IR for packs are normally mid 20's for my good race packs. My best pack right now I think is 24 IR for the pack. I don't know how those numbers translate to the Integy's #'s, but because they make the matcher and the charger, the CE #'s should be pretty acurate.
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Old 12-26-2003, 10:56 AM   #7
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i think some companys tell there ir #'s for each cell and some tell u for everything together like maybe 3 ir would be 18
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Old 12-26-2003, 11:02 AM   #8
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exactly, when you get an ir reading from a charger/discharger, you get the ir for the whoel pack and since resistance adds when in series, like our packs, you should divide that number by the number of cells... and dont forget that you now have bars and solder joints that will add resistance..
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Old 12-26-2003, 11:03 AM   #9
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whoa i actually got it right
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Old 12-26-2003, 03:30 PM   #10
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ive noticed that the IR reading for the integy charger is usually lower during discharging than during charging. i assume that your 35 IR reading is while charging, right? check if that number goes down when you discharge the battery (should be around 24 IR)

if that's your first time to charge a new pack, it goes way more than 3300mah. after a few cycles, it may go down to about 3500 to 3700mah. i have old 3300s that went to 3900mah when new but now go to about 3500mah after a charge. for nimh packs, i set the threshold to the lowest setting on the charger (3 mv, i think)
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Old 12-26-2003, 04:06 PM   #11
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set your peak detect at 3-5mv per cell, the pack should be peaking at about 9 volts, temp should be quite warm but not really hot. for an integy charger 35 ir is pretty good
marvi: i haven't noticed that at all, mine always seem to be pretty close together. are you using an eagle/integy charger?
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Old 12-26-2003, 08:37 PM   #12
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Rory and all, thanks! I'll discharge and see what the IR is at that point just for grins. Also, what does "input" mean? Does anyone else have this charger? I set the peak detect to 5mv. There are some other numbers that charger is showing, I'll make a note next time I charge and post it here to see what they represent.


Thanks,
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Old 12-27-2003, 06:52 AM   #13
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The input voltage? 100-120v/200-240v ac or 12-14v dc
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Old 12-27-2003, 08:48 AM   #14
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Hi!,

Wow you guys are really getting real high numbers for your gp cells, I hv some new GPs (loose cells) the initial charge it gave me
3500mah and went down to 3200mah subsequently and 1 pack even went down to 2800mah... amI doing something wrong?

Im using a Lrp Pulsar comp charger and charging it at 5amps,
peak detect at 05mv (packs are warm)

Any advise ?? Im really bad at this
Thanks
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Old 12-27-2003, 09:18 AM   #15
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Marzin- i just got that chager, and i am also getting numbers like you are. But i think some of these guys are charging at 6 amps? Am i correct? I am charging at 5 amps with a 20mv detect for the whole pack. Any advice from you guys if i am setting the peak detection to high or low, i am charging sanyo 3300 HV, some orion 3300 VDS, and some 3000 sanyos from trinity. Thanks for any help.
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