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Old 02-24-2008, 10:41 PM   #1
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Angry Charging Ni-Cd battery

Hi,

I recently bought the SuperBrain 960 charger, as well as a 3600mah trinity reference Ni-cd battery. I don't know if the battery is defective or I am not using the charger right. Both my 1500 and 3600 Ni-Cd can't seem to last 5 min on stock wheely king. However, my 3000 ni-mh battery lasts about 40min.
The stock 1500 ni-cd lasted longer with my over night charger before.

The setting I am using is about 1-2 amp and 5mv for thresh hold.

Any suggestions? Thanks.
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Old 02-25-2008, 01:19 AM   #2
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How long does each take to charge? Do the batteries get warm? If you charge the ni-cds overnite, is the truck perfomance similar?

If say the 3600 does not get a little warm at the end of the charge, and charges much quicker than the 3000, then it's probably a false peak. Just hit the charge again. But if it's getting warm don't do it again.

Don't be too alarmed, false peaks are not unusual, especially early in the charge cycle, sounds like that is what you are getting. The overnite charger doesn't have this issue.

Check the wiring and all of the battery to battery connections on the problem packs, that can cause issues, false peak as the connection cuts in/out. Should show up on the drive as well.

Try a slightly higher peak detect level. But remember to turn it back down for the Ni-Mh. Ni-cads can take more.

Worst case, the battery may have dead/nearly dead cells.

Good luck.
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Old 02-25-2008, 04:00 AM   #3
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Are you sure your Trinity Reference battery is a NiCd???

Pardon the pun but there is no reference to Trininty Reference 3600 battery pack being either NiCd or NiMh but I suspect it is a NiMh not a NiCd which might have something to do with the poor results your getting from the pack, more so if your charging a NiMh pack as a NiCd.
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Old 02-25-2008, 04:32 AM   #4
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Fair question. But other than peak detect level Ni-Cd and Ni-Mh charge pretty much the same. Both can false peak.

Oh, and the 1-2 amps is pretty conservative. Watch the battery temp during charge, should only get slightly warm except at the end should not be real hot (unholdable) but noticably warm. In general thou 4 amps should be OK. Maybe 3 to be a little on the safe side. 5 to 6 amps will give a little more initial punch, at the expense of runtime and overall battery life, that where most racers are at.
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Old 02-25-2008, 06:57 AM   #5
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Quote:
Originally Posted by jayliu1984 View Post
Hi,

I recently bought the SuperBrain 960 charger, as well as a 3600mah trinity reference Ni-cd battery. I don't know if the battery is defective or I am not using the charger right. Both my 1500 and 3600 Ni-Cd can't seem to last 5 min on stock wheely king. However, my 3000 ni-mh battery lasts about 40min.
The stock 1500 ni-cd lasted longer with my over night charger before.

The setting I am using is about 1-2 amp and 5mv for thresh hold.

Any suggestions? Thanks.
Check what your batteries really are... Nicad or NiMH.
Nicads have a memory.. they need to be treated the same every time. They should be stored discharged. Either with a discharger or run your vehicle until throttle and steering will not work together.
If you leave them with a charge in them for any period of time, they will not fully charge the next time.
The recommended charge rate for these batteries is 2X the capacity.
So the 1500 at 3 amps, The 3400's I would charge at 4-5 amps for what you are doing.
It does sound like you have a weak cell in your 3400 pack.
After a full charge... check the temps of the cells.. if you have a bad one.. it will be cooler than the rest.
Hope this helps.
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Old 02-25-2008, 04:54 PM   #6
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LOL DJ. I've had lipos for like 2-3 weeks, and have already forgotten everything! Yep, back in the day we used to have to discharge batteries.

Already far away and long ago.... Lipos are so cool.
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Old 02-26-2008, 02:09 PM   #7
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Your refrence battery is NiMh. They don't make NiCds above 2400 mah. Depending on how old that superbrain is, the battery may have false peaked. I remeber hearing quite a few people with the 960 had this problem but I thought it was fixed?
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Old 02-26-2008, 05:52 PM   #8
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my charger guide says 4amp for anything 3000mah and up
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Old 02-27-2008, 11:32 AM   #9
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Well, I see on the battery there are three Recycle markings with ni-cd fine print on it. And well I admit it is difficult to investigate. Every site just says it's a performance pack. There is one site mentioned it's Ni-Cd.

The charger is brand new, as well as the battery. Which is why it's so upsetting.

And oh, my Ni-mh battery does have the same recycle logo but with Ni-mh fine print on it. So...

I will try increasing the threshold voltage. And charge it more repeatively.
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