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Old 07-25-2005, 08:56 AM   #1
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Default Peak Detection

What is peak detection mV?
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Old 07-25-2005, 09:34 AM   #2
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I would have thought this would be searchable. lemme know if the search did/does not work for you.
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Old 07-26-2005, 11:21 AM   #3
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I cant find it somehow.... i need a nooB version of the explaination.
Why does my charger or battery buzz when i barely start charging??

thanks
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Old 07-26-2005, 12:46 PM   #4
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Peak detect means how long the charger keeps charging after the pack reaches it's highest voltage value and once the voltage peaks it will keep dropping down until the charger stops charging depending on your peak detect setting. As far as I know it is used more or less as a temperature control adjustment, some types of cells like gp3300 like .05/50mv while other types intellect 3800 like lower like .02/20mv b/c their internal construction, types of materials/chemicals used etc... differ. If you watch your voltage on your charger lest say the pack peaks at 9.1 volts, if your peak detect is .05 then the pack will drop down to 9.05 before charger stops charging, if detect is .02 then will stop at 9.08 for example.
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Old 07-26-2005, 12:55 PM   #5
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Quote:
Originally Posted by SlobbaTech
Peak detect means how long the charger keeps charging after the pack reaches it's highest voltage value and once the voltage peaks it will keep dropping down until the charger stops charging depending on your peak detect setting. As far as I know it is used more or less as a temperature control adjustment, some types of cells like gp3300 like .05/50mv while other types intellect 3800 like lower like .02/20mv b/c their internal construction, types of materials/chemicals used etc... differ. If you watch your voltage on your charger lest say the pack peaks at 9.1 volts, if your peak detect is .05 then the pack will drop down to 9.05 before charger stops charging, if detect is .02 then will stop at 9.08 for example.
hit the nail on the head there..basically the peak detect rating is how much the voltage drops before the charger cuts off.

so if you have a higher peak detect, your cells get warmer, you get more capacity into them but less voltage right..this is because they are on charge for longer but the voltage drops more before the charger cuts off.

and the opposite happens whenyou have a lower cutoff....if that makes sense
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Old 07-26-2005, 01:34 PM   #6
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Quote:
Originally Posted by AZNracerx1989
I cant find it somehow.... i need a nooB version of the explaination.
Why does my charger or battery buzz when i barely start charging??

thanks
by the way if ya batteries are buzzing when charging, they have vented (that is bad!!). They will still work but no were as well as they should....
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Old 07-26-2005, 01:40 PM   #7
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OK i have a silly question, is peak detection the same as voltage threshold.
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Old 07-26-2005, 02:21 PM   #8
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I listened again... it is the charger that is buzzing.... not the battery... is that a problem?? its small high pitch buzz
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Old 07-26-2005, 03:18 PM   #9
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What charger are you using? I have an old Nicad vision peak charger that buzzes for a bit when I first turn it on. Thats just the way its always worked. Yours may be different however.
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Old 07-26-2005, 09:38 PM   #10
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Some type/brand of cells can be more likely to vent than others like the Intellect 3800's I notice do a little where the gp3300's didn't really at all. Usually they will do it super early in the cells life/use and the venting sounds like a quick pfft type sound and all it is from is like tolerances like if too much chemical or material was put into cells. If your pack is abused some or very old and it vents then that's not a good thing and can be dangerous. Charger buzzing, best to contact the company that makes it b/c so far you haven't told us which kind you are using unless I overlooked it. Some of the lower end chargers or older ones would buzz a little, so if that's the case then wouldn't worry about that. If you have a Reedy charger than I'd be worried b/c there was and still is a recall on all of them, a guy locally got injured by one when it charged the battery improperly.
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Old 07-27-2005, 02:00 AM   #11
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Quote:
Originally Posted by AZNracerx1989
I listened again... it is the charger that is buzzing.... not the battery... is that a problem?? its small high pitch buzz
Lots of electric items buzz, it's nothing to worry about. Stick your ear real close to your TV when it is on standby and it will buzz.
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Old 07-27-2005, 03:25 AM   #12
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Default Lead acid battery charging

Hi guys i m using a nosram stealth charger to charge my 12v lead acid battery izzit ok to do so as the charger do not have function for charging lead acid battery.Thanks
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Old 07-27-2005, 04:48 AM   #13
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Lead acid batteries need a different charge method to NiCd batteries, so no, I wouldn't recommend it.
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