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Old 12-30-2009, 04:09 PM   #1
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Questions?? Charging the Hump pack

HEHE I said Hump.. Im using a Onyx 230 charger and have a NiMh 1700 hump pack (5 cell) would I set my charger to 5 cell 1.7A 1700 mah. Or do them little cells equal less then 1 cell?? and what would your settings be. Thanks
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Old 12-30-2009, 04:12 PM   #2
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I would charge it at less than 1 amp.

maybe half the mah rating, so 850ma..

you don't need to rapid charge it, do you?

you're not sitting there waiting for it to be ready?
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Old 12-30-2009, 04:36 PM   #3
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I charge mine at .8 amp..., 1 amp after the 3rd heat...
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Old 12-30-2009, 05:11 PM   #4
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Slow charge will make the pack hold more juice ( last longer ). If in hurry, you can charge it equal or less then 1.7AmH. I always charge it at 0.5AmH on my pack.
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Old 12-30-2009, 05:43 PM   #5
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Slow charge will make the pack hold more juice ( last longer ). If in hurry, you can charge it equal or less then 1.7AmH. I always charge it at 0.5AmH on my pack.
Why do people say slow makes it hold more, I dont understand why that is so. If its charged fast or slow wouldnt it hold the same???
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Old 12-30-2009, 05:48 PM   #6
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Why do people say slow makes it hold more, I dont understand why that is so. If its charged fast or slow wouldnt it hold the same???
when you charge it faster, it gets hotter.

when its hotter, it won't hold the same capacity.

I suppose you could try charging it in the freezer?
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Old 12-30-2009, 05:54 PM   #7
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Why do people say slow makes it hold more, I dont understand why that is so. If its charged fast or slow wouldnt it hold the same???
I learn from EP guys. Fast charge you got the punch but low run time. Slow charge, you get long run time but less punch.
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Old 12-30-2009, 06:22 PM   #8
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I learn from EP guys. Fast charge you got the punch but low run time. Slow charge, you get long run time but less punch.
exactly!

i miss my EP days
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Old 12-30-2009, 06:32 PM   #9
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These are 2/3a cells and max charge I've seen recommended is 1amp. I charge mine at 0.5amp when I have the time and 1amp when I'm in a hurry. At 1.7amp they'll get very hot and will not last long.

These and AAs are an exception to the "1C" safe charge rate rule of thumb.
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Old 12-30-2009, 06:53 PM   #10
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if its just a reciever pack i always do a slow charge especially for those 30 min mains
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Old 12-31-2009, 01:53 PM   #11
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I just came back to nimh,I'm not happy with $42 packs that last 2,3months. I see it will take 2 packs to replace 1 lipo. There just isn't enough break time on race day to slow charge a nimh pack.
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Old 12-31-2009, 02:05 PM   #12
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I would charge it at less than 1 amp.

maybe half the mah rating, so 850ma..

you don't need to rapid charge it, do you?

you're not sitting there waiting for it to be ready?
The directions also call to set the mah over what the battery is capable of. If I am charging a 2500 mah I set it to 2750. Keep in mind the charger has a safe cut off if on the charger too long.
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Old 12-31-2009, 02:23 PM   #13
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The directions also call to set the mah over what the battery is capable of. If I am charging a 2500 mah I set it to 2750. Keep in mind the charger has a safe cut off if on the charger too long.
...why would you do that? unless you really wanna kill the nimh as fast as possible?

charging a battery at such a high rate serves no purpose, except of course rapid charge.

but if you don't need the battery ready in less than an hour, then don't do it!
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