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Old 09-27-2008, 05:06 AM   #1
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Default please help me !!

Hi , i have had this probleme for awhile and its very anoying.
this is my probleme: I want to discharge my batteries so i put them on my nosram gravity discharger and after its discharged at 0.6v i put them on my charger and after 3 minutes my charger peaks around 300 mah . So i put them again on my discharger and when i want to charge them .... agin the probleme. Finally only SOMETIMES im able to fully charger them.
I have a nosram grvity discharger , some orion SHO4200 , some LRP VTEC 4200 and some EP 4200 .
Could somebody help me please.
Thanks in advance.
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Old 09-27-2008, 05:24 AM   #2
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From experience...

You should equalise down to 1.0v per cell. This has a massive improvement over the life of your cells. Your problem is probably your cells are not very good because of your over discharge. Best thing to do is restart the charger if you know it has false peaked. Just check your pack to make sure it is not getting hot. If it is hot, then it is done. If you have any sort of capacity indicator on your charger.. take note of how much has gone in and you will know how much more needs to go in before it is finished. Just keep an eye on your packs so they don't get hot.

A better idea though..

Go get yourself some lipo packs (one or two will replace all your current packs) and a compatible charger. This will save you a lot of hassle with nimh problems. If your club dosen't allow you to use them, change to a more forward thinking club and get back to having fun with RC.
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Old 09-27-2008, 05:43 AM   #3
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Quote:
Originally Posted by Dragonfire View Post
From experience...

You should equalise down to 1.0v per cell. This has a massive improvement over the life of your cells. Your problem is probably your cells are not very good because of your over discharge. Best thing to do is restart the charger if you know it has false peaked. Just check your pack to make sure it is not getting hot. If it is hot, then it is done. If you have any sort of capacity indicator on your charger.. take note of how much has gone in and you will know how much more needs to go in before it is finished. Just keep an eye on your packs so they don't get hot.

A better idea though..

Go get yourself some lipo packs (one or two will replace all your current packs) and a compatible charger. This will save you a lot of hassle with nimh problems. If your club dosen't allow you to use them, change to a more forward thinking club and get back to having fun with RC.
Thanks for the quick reply but i race 5 cell so i cant get LIPO .
Also i only have a discharger board that discharges to 0.6v.I dont have a equalizer or anything like that.
My packs do get hot when on the discharger board but they never get too hot when i charge them they always are normal in the charger.
I thought of getting the muchmore CTX-D2P discharger that is adjustable and can do everything.
So wich probleme is it , do you think i should get new packs and the muchmore discharger, do you think that by discharging them to 0.6v is overdischarged .
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Old 09-27-2008, 07:36 AM   #4
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Quote:
Originally Posted by cyclone speed View Post
Thanks for the quick reply but i race 5 cell so i cant get LIPO .
Also i only have a discharger board that discharges to 0.6v.I dont have a equalizer or anything like that.
My packs do get hot when on the discharger board but they never get too hot when i charge them they always are normal in the charger.
I thought of getting the muchmore CTX-D2P discharger that is adjustable and can do everything.
So wich probleme is it , do you think i should get new packs and the muchmore discharger, do you think that by discharging them to 0.6v is overdischarged .
Dont discharge bwlow .9. May have damaged the cells. depending on the type of charger us the peak lockout to prevent the early false peak you seem to be getting. If there is no false peak protection on youe charger, keep restarting until you reach a total of full charge, discharge to .9 /cell then recharge again(after they have rested 2 hours). If they are still acting funny, then likley you have some bad cells or your chargers delta peak is set too low.
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Old 09-27-2008, 07:54 AM   #5
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He doesn't mention what charger he has. It sounds like it's a charging problem not a battery cell problem.

As mentioned before if you can set the delta peak make it .06v per cell or .08 and try it again. Better yet if your charger has a feature for a long lock out use that for 3-4 minutes. If you can change the delta peak do it but then monitor the cells for excessive heat. Towards the end of their charge stop charging if the pack gets so hot you can't leave your hand on it.
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Old 09-27-2008, 12:07 PM   #6
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i do have delta peak adjustable form 3mv cell to 25mv cell , what should i put.
My charger is quite basic , it only has charge , discharge and cycle and adjustable delta peak , thats all .
I also thought of getting the muchmore cell master and the CTX-D2P discharger.
Do you think that by getting these two equipements it would help , i put my cells on the CTX discharger and discharge each cells to 0.9v and then put them on the cell master to charge. Would this help .
Also when i have finished discharging them can i put them directly on charge or they have to rest . If yes for how long?
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Old 09-27-2008, 12:35 PM   #7
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Quote:
Originally Posted by cyclone speed View Post
i do have delta peak adjustable form 3mv cell to 25mv cell , what should i put.
My charger is quite basic , it only has charge , discharge and cycle and adjustable delta peak , thats all .
I also thought of getting the muchmore cell master and the CTX-D2P discharger.
Do you think that by getting these two equipements it would help , i put my cells on the CTX discharger and discharge each cells to 0.9v and then put them on the cell master to charge. Would this help .
Also when i have finished discharging them can i put them directly on charge or they have to rest . If yes for how long?
A good spot for dPeak would be about 5.
As for the MM charging DC package. Yes, this would be a step uo and used these days should come in under $175 for both.

My batt routine.

Post race charge remains in pack until day before race day.
Discharge day before
Equalize just before charge process
Charge for completion just before heat
Leave post dose heat charge for storage until next use

This has lead to long reliable performance. Maybe a little too long as I tend to miss the power deterioration and when it is time to get new cells for optimum performance. THe cells do well just not awesome like some more wealthy racers who buy new packs several times per season
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Old 09-27-2008, 01:52 PM   #8
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Thanks for the help guys.
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