Battery Problem?

Old 08-23-2009, 07:53 AM
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Default Battery Problem?

Good morning. I have a Venom 7.2v 3300mah NIHM battery pack that I've succesfully charged and run about 5 times at 4amps, as suggested by my LHS, since I got it over the last few days without any problems. Today I hooked it up to my charger from the last time I ran it. It's charging for all of 45 seconds before my charger detects that its peaked. So I hooked it up to my truck and lifted the back wheels and ran it all the way down. I hooked it back up after that and I'm still getting a peak detected in about 45 seconds. I've checked the fuses on my charger and everything is fine. Any ideas as to whats going on? Is my battery pack toast?
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Old 08-23-2009, 09:24 AM
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Guessing its just a false peak. If the batt is not getting hot when it peaks, just restart the charge. If your charger has a peak delay setting, set it at 5min and see if that helps.

What do you have the peak sensitivity set at? Using one thats a little higher may help as well.
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Old 08-23-2009, 09:45 AM
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Thanks for the reply. I'm using a Prophet Plus charger, it doesnt have a peak detection delay. I normally charge it at 4amps. I read somewhere to let it trickle for 10 minutes then repeak it at a lower amp rating which I've tried to no avail. Everytime I reset the charge to peak again it still peaks in about 45 seconds and goes into a trickle charge which I then unhook it.
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Old 08-24-2009, 09:58 AM
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I had trouble with a prophet plus false peaking also, and it turned out to be the tamiya connectors on the charge lead. Replacing it with a deans connector solved the problem. I've also circiumvented the issue repeatedly by just restarting the charge several times until it finally gives in and finished the pack.
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Old 08-24-2009, 01:54 PM
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I'm assuming this Venom pack is a stick pack? Take a volt meter and test the voltage of the pack.. if it is reading less than 6 volts.. you may have a bad cell... unfortunately, Venom is not know for quality.. in any case, stick packs are difficult to maintain. NiMh can be flakey sometimes.. especially if you are not equalizing cells...

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