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Old 10-30-2007, 04:28 PM   #1
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Default Opinion on Nimh Cells

for mod?

Have IPs that i love, but sadly cant find anymore (sad indeed). I've had IBs that go flat after a short usage period. I also recently picked up 2 EP units that i've never got the milli's out of nor run as well as the IPs do.

i know lipo is staring my B4 in the face, but if i were to buy more nimh for this winter, what is the unsponsored opinion on cell type?

R
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Old 10-30-2007, 04:39 PM   #2
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I went lipo because I wanted less stress with my batteries....After only 1 race night with a Lipo, i'll never go back to a 6cell...and that's all I think needs to be said about Lipo packs...
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Old 10-30-2007, 04:39 PM   #3
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EP's seem to be the most popular now. IB's can last if you take care of them and store them properly.

I would go Li-Po though.
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Old 10-30-2007, 04:46 PM   #4
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I love my EP cells. Never gave me issues.
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Old 10-30-2007, 05:20 PM   #5
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I would go with lipo, they are starting to go really cheap right now. Sometime even cheaper than some nimh packs. I have seen good brand new 4000mah lipos going for about $60.
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Old 10-30-2007, 06:23 PM   #6
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I have found the EP's to be a very good performer that has proven to be much more rugged then the IB's. Not sure how old your EP's are but the new MII cells are pushing some great voltage numbers. The newer cells I have, have been peaking out from 4800 to 5000 millis. They also perform better on the second run of the day. If you haven done so give them an other try you may find you like them. If you have anymore questions on these cells follow the link below and ask. .

http://www.rctech.net/forum/showthre...141322&page=44
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Old 10-30-2007, 06:53 PM   #7
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Lipo never going back...

The biggest thing I hated about nimh cells was the heat generated while charging... When I used my friends Lipo and saw the packs don't even get warm after a full charge, I was sold.

Plus!

No more cell balancing (Orion)
No more discharging
No more cell venting
No more accidental battery shorts like with assembled packs

Sure you have to have a few precautions, low voltage cut off, proper charger but this is normal stuff.
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Old 10-30-2007, 07:40 PM   #8
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is anyone using a lipo with a standard esc
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Old 10-30-2007, 09:11 PM   #9
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ive run a orion 4800 in a b4 w/gts speed control , no lipo cut off , if thats what you mean , ray
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Old 10-30-2007, 09:13 PM   #10
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also you can buy a novak lipo cut-off for like 25 bucks , ray
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Old 10-30-2007, 09:28 PM   #11
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my LRP sphere comp has the cutoff built in so I can run my pack as hard as I want until it hits the cutoff mark and the car will literally go neutral. Amazing feature to have and no external wires/pieces for that feature so, i'm lovin' my LRP!
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Old 10-31-2007, 02:02 AM   #12
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I'd say EP cells. It's rare to have a battery not last. Too many problems with the IB. You never know what's going to happen with them. But if they were professionally maintained they might last. IDK. I see to many people have IB cells drop out at any time. Still have yet to hear about a bad time with the EP on a local level.
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Old 10-31-2007, 10:20 AM   #13
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Quote:
Originally Posted by ultegrasti View Post
for mod?

Have IPs that i love, but sadly cant find anymore (sad indeed). I've had IBs that go flat after a short usage period. I also recently picked up 2 EP units that i've never got the milli's out of nor run as well as the IPs do.

i know lipo is staring my B4 in the face, but if i were to buy more nimh for this winter, what is the unsponsored opinion on cell type?

R

I have switched from buying gp's to IP's and i love my ip3800's they are great and just get better. I get them from john at team scream he might still have a few left. Great power and runtime in these packs. I have 5 of them and at $35 each i feel i couldnt go wrong. I want lipo though cause i caught 2 guys racing with lipos on sunday when its not allowed i didnt say anything but i want to run lipo now.
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Old 11-01-2007, 01:20 AM   #14
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I would concur that EP cells are a good reliable cell - the new 4600 cells are out and hitting the shelves.

LiPo is good but may not be legal where you race. They are lighter and will alst mor cycles than NiMh cells but certainly not forever. I raced 6000 Mah MaxAmps LiPos for about 8 months once or twice a week (I had 2 packs) before they fizzled out and went flat. They both went flat about the same time. So, they last about 2 times as long as NiMh (give or take) and don't generate the heat either. You MUST have a LiPo charger and youy uSHOULD have a LiPo cut-off speed control. Running below 3 volts per cell or charging higher than 4.2 volts per cell is a good way to kill your cells. LiPos should be balanced every time they are charged - you can get by with checkign them every so often if they stay in balance but if they don't stay in balancec then you MUST balance every time they are charged.
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Old 11-01-2007, 09:52 AM   #15
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Get the Li-Po

Cus you will still be racing with um and going fast, long after the Nk-Ml packs fade away...
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