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rnbch
02-07-2006, 12:11 PM
I have 6 3300 GP NiHm batteries can I use thoes in my inferno

I see all the batteries package you can get is with 1100 -1200 mha.

does it not work with 3300....?

bermbuster
02-07-2006, 02:02 PM
the mini inferno uses smaller cells. 2/3a cells. the cells you have are much larger sc type. There is no room and they will make the mini inferno super heavy. If you want to use a cell with more mah capacity you need to use lipo cells in the mini inferno.

Hawk
02-07-2006, 04:21 PM
If you change the transmition/ctr diff and mount the motor on the other side to the rear you could use a 540 motor and those 3300mAh babies would come in handy, balancing the weight of that big a** motor.
On the other hand, if you use a small can motor like a 300 class, you can get good run times and balance the car with 2/3 A cells like most people use or if you have to go brushless you can scream into a wall somewhere at 45mph (720mph in Mini Inferno) with the knowledge that it may explode, emit toxic gasses and shock your parents (if they are still alive).

IMHO

lux
02-07-2006, 08:04 PM
I run 2300mAh AA-cells, four on each side, which gives me high amp and long run-times. I built this battery myself and it fits into the M-I if you throw out the battery-holder and fix the cans with velcro. I would like to put pics of it into the gallery here, but it doesn't work and the admins don't answer my query. Nevertheless, if you give me your e-mail, I could send you pics directly.
Bye.

Jos

bermbuster
02-07-2006, 09:43 PM
aa cells can have more mah but they do not discharge at same amperage as a cells. You definitely get more runtime but not the same speed and power as with a 2/3 a cell.

lux
02-08-2006, 07:32 AM
You're an electronic's expert?
The maximum drawable amp depends on the inner resistance and the built-in capability to give high amounts of juice. You have to buy cells which are built for high-amp-draw, regardless wether they are AA or sub-C or whatever. I can tell you that my M-I goes faster with my self-made 8x2300mAh AA-cells than with the upgrade 1100mAh super-expensive-special-battery from whomever. Even though the weight is above. For jumps it may be less good as a big part of the supplementary weight goes backwards, but that's the only negative side.
Pics will follow as a forum-buddy offered me to post them for me... tonight! :cool:

See ya!

Jos

bermbuster
02-08-2006, 10:05 AM
post the numbers on the resistance of your cells.....todays ib1200s and gp1100s are superior to any aa cell i found.

lux
02-08-2006, 11:32 AM
The only numbers that count for me are mph! :p

pimpsmurf
02-08-2006, 12:05 PM
Because of power:weight, the 2/3a will have more mph too!

Many of the 1:10 electric guys run 3300 instead of the big fancy new HEAVY ASS 4400. Only 1 is using the 4800 lithiums. They are lighter than the 3600s! Not to mention that the guy using 3300s discharged 4 packs to my friends single 4800. Lithium batteries put out much closer to thier actual rated capacity when pulling higher than 1C.

If you want longer runtimes, go with a high capacity lithium setup. It isn't that hard to mount 2ah worth of lithiums on a stock chassis, and will have a longer runtime than a 3300 because of voltage efficiency.

-JNY

lux
02-08-2006, 02:47 PM
@pimpsmurf
You're perfectly right. The discussion was about comparing NiMH to NiMH of a different built. Comparing NiMH with LiPo is unfair, as LiPo's are lighter and stronger in any way. A few years from now and nobody will talk about NiMH anymore.

Jos

bermbuster
02-08-2006, 03:07 PM
hey Lux,
now you got my curiosity......2/3a cells i use have between 8-12mohm of internal resistance. Which brand cells are you using and what is there measurement? Here in the US 2/3a cells are only about $2 each. How much did you pay for your aa cells?

Hawk
02-08-2006, 06:25 PM
It is like what I have been saying about LiPo batteries. You have to look at the discharge rates too. A 10c battery is o.k. for running around the back yard but take the time a look for the 20c cells. They tend to cost more and I think some are larger than the 10c versions with the same mAh rating.

lux
02-09-2006, 12:38 PM
hey Lux,
now you got my curiosity......2/3a cells i use have between 8-12mohm of internal resistance. Which brand cells are you using and what is there measurement? Here in the US 2/3a cells are only about $2 each. How much did you pay for your aa cells?

My buy is a Conrad Energy (german brand) which costs around 5.-€ (so you more than double the price you pay to get something serious). When I select the cells to build a battery, I measure the internal resistance and find values around 12mOhm, sometimes less, on the 2300 cans.
But with that kind of running times, you're always quicker than your buddies as they have to come in and change the cans, when you still run :cool:

Jos

Hawk
02-09-2006, 08:24 PM
Links for Lux photos:
http://halfeight.com/gallery/showphoto.php?photo=692&cat=500&page=1
http://halfeight.com/gallery/showphoto.php?photo=693&size=medium&cat=500&page=1
http://halfeight.com/gallery/showphoto.php?photo=691&size=medium&cat=500&page=1
http://halfeight.com/gallery/showphoto.php?photo=690&size=medium&cat=500&page=1
http://halfeight.com/gallery/showphoto.php?photo=689&size=medium&cat=500&page=1

bermbuster
02-09-2006, 10:26 PM
here when we race we have 5 min. qualifiers and a 5 minute main event. So the higher capacity cells are more of a bashers best friend. I know when I have too much runtime i get bored and do something that gets me in trouble..... :cool: