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Old 05-17-2003, 04:23 PM   #1
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Default Fried Nimh?

I was charging my Nimh batteries yesterday at 5 amps, and when I came back after a while the pack was very hot. The plastic had melted off a few of the batteries completely. Have I destroyed this pack? I have the intellipeak charger and if I don't disconnect the batteries the charger will keep charging untill the batteries are very hot. They will get too hot to hold for more than a second or two. They shouldn't be that hot right, just warm.

They get too hot to hold after i've used them in my car for a run .
Is this normal? I know my gearing is in the ballpark so i don't think it's that.

Also how hot should my 14 turn motor be with proper gearing?

Any ideas or recommendations. I'm now charging them at 4.5.


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Old 05-17-2003, 05:08 PM   #2
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Did you let the batt cool before you charged it? If you are going to charge it at the packs limet atleast let it cool down. I have a nicd that melted off the heat shrink and it still works.
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Old 05-17-2003, 07:44 PM   #3
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Yes i did let them cool between runs. Your right though they are fine since i posted i have been using them without an decline in performance. It just concerns me how hot they get after use. Maybe i should wait longer after there done charging to use them.
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Old 05-18-2003, 05:46 AM   #4
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try gearing down a few teeth. how long can you touch your motor? you should be able to touch no less than 3 sseconds.
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Old 05-18-2003, 11:14 AM   #5
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I think your charger is overcharging your NiMH's, they shouldn't get more than warm to the touch during charging. Is it a NIMH charger, or NiCD only. And those chargers that trickle after peaking are bad for NiMH's, I believe.
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Old 05-18-2003, 12:42 PM   #6
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It is a nimh charger, and yes I think your right it is over charging my batteries. I lowered it down to 4.5 amps and the batteries seem alot cooler during charging.

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Old 05-25-2003, 09:49 AM   #7
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I have used a Intellipeak on all my RX packs (nimh) for the last two years, I found out really quick, buy a small fan like a wall mart special for 10 bucks, put the batts and the charger in front of it, it will work great. I used to have probs with it either over charging or false peaking my RX/TX packs and starter box batts, since the fan, works like a charm and the 7.2 packs never break 105 degrees at a 5 amp charge. the RX batts hit about 100 on a 1 amp change and last forever.
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Old 05-25-2003, 09:54 AM   #8
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Thanks for the feedback, but i just sold my intellipeak on ebay and am looking to get a integy 16x5, 16x7, or quasar pro. I think the intelli peak can charge ok if you keep it cool and the battery with a fan but i found the discharger cuts off too low and i didn't want to buy a seperate discharger.
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