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Old 12-12-2007, 01:59 AM   #1
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Default Battery Advice Please

Howdy,

Newbie to the Hobby. My son (7 Y.O. ) and I are getting a used Rustler and Stampede for Christmas. I've got the trucks but need batteries.

I found a deal for some Hump Packs
-----------
High Capacity High Power Nickel Metal Hydride Battery Pack for RC cars.
NiMH technology enables convenient charging at any time. No cell memory effect. No need to fully discharge before recharging.
High power delivery with 38 Amp maximum discharge rate.
Standard Dimension: Height 1.5"; Width 1.7"; Length 5.5" inch, fits all RC10 cars
Weight: 15 Oz
Capacity: 3800 mAh
Voltage: 8.4 V
Connector: Standard Tamiya
Standard Charge: 12 hours @ 300 mA
Rapid Charge: 1.5 hours @ 3000 mA
-----------------
The cells are labeled "Tenergy".

Are there any serious drawbacks to using the 8.4v packs? Both of the Traxxas rigs have XL-1 ESC and Stinger motors.

Also any feedback on the Tenergy cell packs themselves?

Thanks,

Michael

Last edited by mjcostel; 12-12-2007 at 03:38 AM.
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Old 12-12-2007, 02:32 AM   #2
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so, these are 7 cell (airsoft style) stick packs right? they should work with the ESC and give a bit more speed (maybe 5mph more). these should be fine, unless you're racing, when you'd want some nice 4200mah packs.
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Old 12-12-2007, 02:36 AM   #3
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never heard of those but you can get some venom packs in 3000 MAH pretty inexpensive (6 cell 7.2 v) and trinity is also coming out with inexpensive packs as well. (6 cell). max amps also has some good packs. from personal experience if you are not going to be running these weekly i would STAY AWAY from 4200's. they need at least weekly attention!
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Old 12-12-2007, 02:56 AM   #4
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Default They are seven cell packs

They are the seven cell packs. I am not going to be racing at all, but thought it might be nice to have a little extra punch.

Mostly I was wondering if I might be more apt to damage the motor or other components by running above the more standard 7.2V packs.

Also, any guess how long a run times I might get from the 3800Mah packs on the mostly stock Rustler and Stampede?

Thanks

Michael
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Old 12-12-2007, 06:41 AM   #5
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hold that brain train......has anybody asked the question of 'will it fit in the car' shouldnt that be the first concern???? coz it is pointless having a 7-cell pack.....if it dont fit in the tray.
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Old 12-12-2007, 07:01 AM   #6
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Default Will it fit?

The 7th cell is right in the center top of the standard Traxxas 6 pack configuration. It looks like it will fit with no problem.

Thanks,

Michael
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Old 12-12-2007, 08:26 AM   #7
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I would get some cheap 6 cell stick packs. Look for 3300 or better. There are a ton of companies that make inexpensive stick packs.

Slingshot Batteries
Orion
Reedy
Trinity
Venom

and others.

Your LHS should have a couple to choose from. For you guys that are just getting started, get some stick packs and have some fun.
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Old 12-12-2007, 09:09 AM   #8
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are these batt any good

http://cgi.ebay.com/11-1V-10C-8000mA...QQcmdZViewItem
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Old 12-12-2007, 09:17 AM   #9
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Lipos require special chargers. That will be way too much voltage for you guys if you are learning how to drive though. You want to keep the car controllable as you learn the ropes and start strapping in more speed. Have fun with the cars and learn to drive them. If you make them go to fast it will get frustrating and you will break stuff all the time.
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Old 12-15-2007, 07:46 PM   #10
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IF YOU ARE JUST WANTING TO PLAY AROUND THEN YOU CAN JUST GET SOME 1800'S OR SOMETHING OF THAT SORT, THEN YOU WONT HAVE TO GET ANY SPECIAL CHARGERS THAT WILL CHARGE NIMH OR LIPOS, YOU CAN GET AN INEXPENSIVE CHARGER AND HAVE FUN
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Old 12-15-2007, 08:20 PM   #11
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Second on some cheap nicds. I would just go with these.
http://www3.towerhobbies.com/cgi-bin...?&I=LXJA83&P=0
They will discount the price some if you order multiples, just look on the page for the part w/ multiples. With these packs you should only run them once in a day, but you can purchase like 10 of them and a cheap nicd charger all for under $100. You should get around 5 minutes of run time w/ a battery so you can charge up your packs and run the two cars for 5 minutes, let them cool for a few minutes & then run them again. To be on the safe side I would pick up two chargers, I doubt they are built to charge 10 packs or so in a row so you can alternate them back and forth so they last a long time.
http://www3.towerhobbies.com/cgi-bin...?&I=LXSG85&P=0
those should make fine chargers for what you need.
This setup should last you a whole lot longer then a nimh pack w/ a charger for each of you. If you look on the front of towers site you can also find discount codes.
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