Go Back   RCCrawler Forums > RCCrawler Brand Specific Tech > Heritage Crawlers > Axial AX-10 Scorpion
Loading

Notices

Thread: lipo Batterys

Reply
 
LinkBack Thread Tools Display Modes
Old 12-05-2010, 04:39 PM   #1
Newbie
 
Join Date: Dec 2010
Location: Australia
Posts: 6
Unhappy lipo Batterys

Hi I am new to rc rock crawling and recently blown my lipo 7.4v 2300amp battery.

I am running a ezrun bushless esc and 32t motor in a Axial ax10 Scorpion.

Can someone please advise me on what battery to perchase next and please explain what the amps in the batteries do and what the volts do???

Call me stupid but I really do not know Please help
mungko is offline   Reply With Quote
Sponsored Links
Old 12-05-2010, 04:48 PM   #2
Rock Crawler
 
Join Date: Oct 2009
Location: Michigan
Posts: 891
Default

What killed your old battery? Did you run the voltage too low, or did you put too much draw on it and puff it?
BLKXJ 96 is offline   Reply With Quote
Old 12-05-2010, 04:59 PM   #3
Newbie
 
Join Date: Dec 2010
Location: Australia
Posts: 6
Unhappy

Quote:
Originally Posted by BLKXJ 96 View Post
What killed your old battery? Did you run the voltage too low, or did you put too much draw on it and puff it?
I crossed the positive and negative wires

BLXJ 96
so what are the amps and what is the volts please explain??
mungko is offline   Reply With Quote
Old 12-05-2010, 05:18 PM   #4
Rock Crawler
 
Join Date: Oct 2009
Location: Michigan
Posts: 891
Default

Quote:
Originally Posted by mungko View Post
so what are the amps and what is the volts please explain??
2s lipos are 7.4 volts, the mAh is the how much voltage that battery will hold, kinda like a gas tank on a car. A 30 gallon tank will get you farther than a 15 gallon tank. A 3000mAh battery will last longer than a 1500mAh battery.
BLKXJ 96 is offline   Reply With Quote
Old 12-05-2010, 07:39 PM   #5
Rock Crawler
 
Join Date: Oct 2010
Location: Ontario
Posts: 577
Default

Think of it like a garden hose. Volts are you pressure and the amps are the flow/amount of water. The more volts you have the more you are gonna get out on the battery, and the more amps/MHA it has the longer it will last.
DioptricStraw is offline   Reply With Quote
Old 12-06-2010, 03:54 AM   #6
Newbie
 
Join Date: Dec 2010
Location: Australia
Posts: 6
Default

Quote:
Originally Posted by DioptricStraw View Post
Think of it like a garden hose. Volts are you pressure and the amps are the flow/amount of water. The more volts you have the more you are gonna get out on the battery, and the more amps/MHA it has the longer it will last.
DioptricStraw
Thanks It was just what I was thinking.

So running a 7.4v 4000amp lipo sould be good for a ezrun esc with more run time than a 7.4v 3200amp YES? and what dose the 2s sand for? "dose it mean its a 2 cell lipo battery"?
mungko is offline   Reply With Quote
Old 12-06-2010, 04:04 AM   #7
Newbie
 
Join Date: Dec 2010
Location: Australia
Posts: 6
Default

Thanks mate, it was just what I was thinking the the bigger the battery the more the volt, and the more amps the longer the run time right ?

So running a 7.4v 5000 amp lipo sould be ok for a ezrun 1200kv crawler-35a esc YES?
mungko is offline   Reply With Quote
Old 12-06-2010, 05:41 AM   #8
Rock Crawler
 
Join Date: Oct 2010
Location: Chezzetcook Nova Scotia
Posts: 537
Default

the "S" value tells you how many cells in the lipo battery. Each cell has a nominal voltage of 3.7 volts. so, a 2S lipo will be 7.4 volts (nominal, at full charge it will hit 4.2 per cell, but lets just stick to the basics). The mAh value is amount of stored energy at the listed voltage. Just like the guys above said,,, the gas tank. A 5000 mAh battery will deliver 7.4 volts at an amp draw of 5 amps (which is 5000 mAh) for one hour. (mAh is milli amp hours). If you draw 10 amps the battery should last about 30 minutes, 20 amp draw and you will get 15 minutes out of it.
The "C" value of the lipo is a rating of how maximum, and fast the energy can be released without damage to the lipo. A 20C 5000mAh battery can deliver 100 amps max. its 20C times the Amp value of 5amps (5000 mAh). so 20x5= 100. This means if you had a large ESC and motor that might draw up to 100 amps on hard acceleration This battery could just supply enough juice.

On a crawler I would highly doubt you would ever draw more than 20 amps under an extreme bind situation.

My 1300 mAh 2S turnigy lipos last about 40 minutes so my average draw is about 2 amps. Im running a Novak Rooster crawler ESC and 55t combo. on my AX10 with 16/84 gearing.

If I were to draw 20 amps it would only last 3.5 minutes.
madkawi650 is offline   Reply With Quote
Old 12-06-2010, 09:43 AM   #9
Rock Crawler
 
Super's Avatar
 
Join Date: Feb 2009
Location: Fox Valley
Posts: 960
Default

A little something I found in a search...

If you are wondering what the 2-6S in parenthesis means; it is a way the battery manufactures indicate how my cells hooked in series (S) the battery pack contains.

3.7 volt battery = 1 cell x 3.7 volts
7.4 volt battery = 2 cells x 3.7 volts (2S)
11.1 volt battery = 3 cells x 3.7 volts (3S)
14.8 volt battery = 4 cells x 3.7 volts (4S)
18.5 volt battery = 5 cells x 3.7 volts (5S)
22.2 volt battery = 6 cells x 3.7 volts (6S)I should point out you may run across packs or cells hooked up in parallel to increase the capacity. This is indicated by a number followed by a "P". Example: 3S2P would indicate 2, three celled series packs hooked up in parallel to double the capacity.


This is the web site if you wanna read more.............http://www.rchelicopterfun.com/rc-lipo-batteries.html

Last edited by Super; 12-06-2010 at 09:47 AM.
Super is offline   Reply With Quote
Old 12-06-2010, 03:01 PM   #10
Suck it up!
 
Duuuuuuuude's Avatar
 
Join Date: Mar 2008
Location: Arkansas
Posts: 11,652
Default

Quote:
Originally Posted by madkawi650 View Post
On a crawler I would highly doubt you would ever draw more than 20 amps under an extreme bind situation.
Wanna bet?
Duuuuuuuude is offline   Reply With Quote
Old 12-06-2010, 03:20 PM   #11
RCC Addict
 
Join Date: Nov 2008
Location: Greece, sun, sea and rocks
Posts: 1,242
Default

Uhm my puller has shot up to 90A momentarily under heavy loads (not only binds).
MadForce is offline   Reply With Quote
Reply



Thread Tools
Display Modes

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 On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -6. The time now is 06:28 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.
Copyright 2004-2014 RCCrawler.com