R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 04-01-2011, 03:46 PM   #1
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default Battery Life

Hi, i'm new to the RC world just got my first car today. But anyways my question is on a 8.4v 3000 mAh Ni-Mh how long should it last mine only lasted 10min off the first charge im running the 2.4ghz brushless drift star from Exceed. I would post a link but this is my first post and it will not let me and yes i know exceed was a poor choice but i wanted something cheap enough where if if i didnt like it i would not be out big bucks. and help would be very much appreciated.
Snakp4k is offline   Reply With Quote
Old 04-01-2011, 06:04 PM   #2
Tech Adept
 
housey's Avatar
 
Join Date: Nov 2005
Location: ENGLAND
Posts: 232
Trader Rating: 1 (100%+)
Default

That run time doesn't sound too disastrous, although with it being a drift car the loads are quite low so I guess you could expect it to last longer than that.

But like I say, its not drasticly bad or anything. Not sure there is too much for you to worry about. Seen as the battery pack came with the kit you can be pretty sure its low quality. I'm sure if you buy a cheap LIPO you would see much improved runtime.

Also, lower quality drivetrain and brushless systems are bound to not be as efficient as more expensive units, so that won't be helping the issue either.

If you've got any buddies with a LIPO see if you can give it a try. The only way too see if something is faulty is to test it against something else you know works (your mates LIPO for example).

Hope that helps.
__________________
Chris Swallow - Team Yokomo - GM Racing - Ko Propo

Donny Racing - http://donnyracing.yolasite.com/forum.php

Poweeeeerrrrr!
housey is offline   Reply With Quote
Old 04-01-2011, 06:15 PM   #3
Tech Adept
 
clittle's Avatar
 
Join Date: Mar 2008
Posts: 138
Default

You might find that after a few cycles of charge and run you might get a bit more time out of the battery.

When you charged the battery, what was the mah reading?
__________________
Latest is a Tamiya TB04 Pro..... Love it!!!
Aussie in Japan!
clittle is offline   Reply With Quote
Old 04-01-2011, 06:57 PM   #4
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default

Quote:
Originally Posted by housey View Post
That run time doesn't sound too disastrous, although with it being a drift car the loads are quite low so I guess you could expect it to last longer than that.

But like I say, its not drasticly bad or anything. Not sure there is too much for you to worry about. Seen as the battery pack came with the kit you can be pretty sure its low quality. I'm sure if you buy a cheap LIPO you would see much improved runtime.

Also, lower quality drivetrain and brushless systems are bound to not be as efficient as more expensive units, so that won't be helping the issue either.

If you've got any buddies with a LIPO see if you can give it a try. The only way too see if something is faulty is to test it against something else you know works (your mates LIPO for example).

Hope that helps.
I was told that i could not use LIPO that it would Smoke my ESC.?
Snakp4k is offline   Reply With Quote
Old 04-01-2011, 07:00 PM   #5
Tech Adept
 
housey's Avatar
 
Join Date: Nov 2005
Location: ENGLAND
Posts: 232
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Snakp4k View Post
I was told that i could not use LIPO that it would Smoke my ESC.?
Hhhmmm I wait to be corrected but not sure how it would smoke your ESC. Nominal voltage is only 0.2V higher. You might smoke the LIPO as I'm guessing the ESC won't have a low voltage cut off. But I would have thought the ESC would be fine to run a LIPO without it going boom boom.
__________________
Chris Swallow - Team Yokomo - GM Racing - Ko Propo

Donny Racing - http://donnyracing.yolasite.com/forum.php

Poweeeeerrrrr!
housey is offline   Reply With Quote
Old 04-01-2011, 07:00 PM   #6
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default

Quote:
Originally Posted by clittle View Post
You might find that after a few cycles of charge and run you might get a bit more time out of the battery.

When you charged the battery, what was the mah reading?
All i have is the stock wall charger (that will be replace tomorrow 4hours to charge a battery is to long) so it does not give any readings
Snakp4k is offline   Reply With Quote
Old 04-01-2011, 07:04 PM   #7
Tech Apprentice
 
Join Date: Feb 2011
Location: NEPA
Posts: 96
Default

You can always by a lipo low voltage cut off circuit http://shop.ebay.com/i.html?_kw=nova...rusck=1&_sop=1 for your ESC so you can run lipo batteries. I'll probably do just that so I can now run my new lipo's in my Clodbuster.
Lynn
__________________
Tamyia Cobra R Mustang TA02, HPI Sprint2 Sport, Super Clod Buster, Twin Detonator, AE B4.1, RC10 Gold Pan (mine)

Tamiya Super Clod Buster, Blackfoot Extreme, HPI Sprint2 Sport (My boy's)
CobraRman is offline   Reply With Quote
Old 04-01-2011, 07:54 PM   #8
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default

Quote:
Originally Posted by housey View Post
Hhhmmm I wait to be corrected but not sure how it would smoke your ESC. Nominal voltage is only 0.2V higher. You might smoke the LIPO as I'm guessing the ESC won't have a low voltage cut off. But I would have thought the ESC would be fine to run a LIPO without it going boom boom.
From what the people at nitrorcx told me is that i would have to upgrade the ESC,and motor to be able to run lipo. they said if you put in a lipo that it would cause the ESC to get to hot even with the cooling fan runing and that it would cause the motor to run hot and melt things. Im a Noob at this stuff so i don't know if im getting the shaft or if they are telling me the truth.
Snakp4k is offline   Reply With Quote
Old 04-01-2011, 09:34 PM   #9
Tech Elite
 
defcone's Avatar
 
Join Date: Feb 2009
Location: Sydney
Posts: 2,344
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by Snakp4k View Post
From what the people at nitrorcx told me is that i would have to upgrade the ESC,and motor to be able to run lipo. they said if you put in a lipo that it would cause the ESC to get to hot even with the cooling fan runing and that it would cause the motor to run hot and melt things. Im a Noob at this stuff so i don't know if im getting the shaft or if they are telling me the truth.
I tried drifting once with a 5.5t motor and nothing got even remotely hot or warm for that matter. I was using a 5200mah lipo which was a year old and still got around 40-50mins worth of runtime.
defcone is offline   Reply With Quote
Old 04-02-2011, 03:40 AM   #10
Tech Adept
 
housey's Avatar
 
Join Date: Nov 2005
Location: ENGLAND
Posts: 232
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Snakp4k View Post
From what the people at nitrorcx told me is that i would have to upgrade the ESC,and motor to be able to run lipo. they said if you put in a lipo that it would cause the ESC to get to hot even with the cooling fan runing and that it would cause the motor to run hot and melt things. Im a Noob at this stuff so i don't know if im getting the shaft or if they are telling me the truth.
Quote:
Originally Posted by defcone View Post
I tried drifting once with a 5.5t motor and nothing got even remotely hot or warm for that matter. I was using a 5200mah lipo which was a year old and still got around 40-50mins worth of runtime.
From what defcone says, sounds like a shaft to me, to make you pay more to upgrade everything. How hot did it get running with your current battery?
__________________
Chris Swallow - Team Yokomo - GM Racing - Ko Propo

Donny Racing - http://donnyracing.yolasite.com/forum.php

Poweeeeerrrrr!
housey is offline   Reply With Quote
Old 04-02-2011, 11:54 AM   #11
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default

Quote:
Originally Posted by housey View Post
From what defcone says, sounds like a shaft to me, to make you pay more to upgrade everything. How hot did it get running with your current battery?
I just got done with the 5th charge of the battery, and it ran for about 20min but the battery was so hot you could not touch it for a bit but the motor and Esc where cool to the touch.
Snakp4k is offline   Reply With Quote
Old 04-02-2011, 07:19 PM   #12
Tech Adept
 
clittle's Avatar
 
Join Date: Mar 2008
Posts: 138
Default

Quote:
Originally Posted by Snakp4k View Post
I just got done with the 5th charge of the battery, and it ran for about 20min but the battery was so hot you could not touch it for a bit but the motor and Esc where cool to the touch.
That sounds like the motor and Esc are going great and the battery seems to be getting better.
__________________
Latest is a Tamiya TB04 Pro..... Love it!!!
Aussie in Japan!
clittle is offline   Reply With Quote
Old 04-02-2011, 07:49 PM   #13
Tech Adept
 
housey's Avatar
 
Join Date: Nov 2005
Location: ENGLAND
Posts: 232
Trader Rating: 1 (100%+)
Default

Quote:
Originally Posted by Snakp4k View Post
I just got done with the 5th charge of the battery, and it ran for about 20min but the battery was so hot you could not touch it for a bit but the motor and Esc where cool to the touch.
20 mins sounds like a fair run time to me. But if the motor/esc isn't hot yet the batt is, I'd say the batt is a bit dodgy. Is it running tamiya bullet connectors? If yes then get those changed out straight away because they will be a major cause of heat and run time loss.
__________________
Chris Swallow - Team Yokomo - GM Racing - Ko Propo

Donny Racing - http://donnyracing.yolasite.com/forum.php

Poweeeeerrrrr!
housey is offline   Reply With Quote
Old 04-02-2011, 08:43 PM   #14
Tech Elite
 
Flying Monkey's Avatar
 
Join Date: Sep 2007
Location: Ringgold, GA
Posts: 4,452
Trader Rating: 54 (100%+)
Default

Quote:
Originally Posted by CobraRman View Post
You can always by a lipo low voltage cut off circuit http://shop.ebay.com/i.html?_kw=nova...rusck=1&_sop=1 for your ESC so you can run lipo batteries. I'll probably do just that so I can now run my new lipo's in my Clodbuster.
Lynn
Great investment for running a lipo with a esc without a voltage cut off. Has a low voltage warning light and then starts to cog/ surge the vehicle once its hit the 6v mark. have run them on many cars.
__________________
MONKEY BUSINESS RACING
Flinging poo at a track near you! Winning hearts and minds everywhere!
www.graphicmonkeydesigns.com
Brooksphotodesign.net
Flying Monkey is offline   Reply With Quote
Old 04-02-2011, 10:16 PM   #15
Tech Rookie
 
Join Date: Apr 2011
Location: North East Texas
Posts: 6
Default

Quote:
Originally Posted by housey View Post
20 mins sounds like a fair run time to me. But if the motor/esc isn't hot yet the batt is, I'd say the batt is a bit dodgy. Is it running tamiya bullet connectors? If yes then get those changed out straight away because they will be a major cause of heat and run time loss.
Yes i have the bullet connectors. What would you suggest that i get?
Snakp4k is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
battery life spud143 Electric Off-Road 14 04-10-2008 07:52 PM
battery life Hang_TiMe Rookie Zone 6 12-09-2007 12:02 AM
Battery Life? Bighomedog11 Electric Off-Road 16 02-05-2007 03:34 AM
Battery life ajg Electric On-Road 13 08-29-2003 10:39 PM



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 12:30 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net