R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 09-12-2008, 09:01 PM   #151
Tech Addict
 
Join Date: Jun 2008
Posts: 538
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by JorgD View Post
I did buy a few of the GE Power 4000 25C and 5000 25C batteries (2 of each, in case I get a bad one) which seem to be exceptionally cheap. They cost me about $33 and $52 each (yep, you do pay a massive premium for those extra 25% capacity of the 5000 over the 4000) and the tests came up well.
Where to get the GEs?
stocker is offline   Reply With Quote
Old 09-12-2008, 09:19 PM   #152
Tech Initiate
 
Join Date: Oct 2005
Posts: 23
Default

I got them on e-bay. I search for words like LiPo, Li-Po, 25C, 30C and 7.4v (not all at once or you get nothing) and then I wade through the results trying to find interesting batteries to purchase and test. If I like what I test, I buy more.

That is how I found the Yeah batteries in the first place and now the GE's.

The merchant that sold me the batteries advertises them as:

RC Lipo battery Car Truck Buggy 4000mah 7.4v 25C 220g

Last edited by JorgD; 09-12-2008 at 09:32 PM.
JorgD is offline   Reply With Quote
Old 09-13-2008, 07:07 AM   #153
Tech Addict
 
Join Date: Jun 2008
Posts: 538
Trader Rating: 2 (100%+)
Default

Cool. They don't seem to have a hard case?
stocker is offline   Reply With Quote
Old 09-13-2008, 07:13 AM   #154
Tech Regular
 
Dan/Ultraline's Avatar
 
Join Date: Mar 2006
Location: Topeka, Ks
Posts: 360
Trader Rating: 1 (100%+)
Send a message via AIM to Dan/Ultraline Send a message via MSN to Dan/Ultraline Send a message via Yahoo to Dan/Ultraline
Default

Hint the price That's why there a little cheeper then the Yeah Racing Lipos. Yeah Racing 4000mAh has a HARD Case.

Quote:
Originally Posted by stocker View Post
Cool. They don't seem to have a hard case?
__________________
Dan Filbert
www.ultralinehobbies.com
Dan/Ultraline is offline   Reply With Quote
Old 09-13-2008, 07:47 AM   #155
Tech Addict
 
Join Date: Jun 2008
Posts: 538
Trader Rating: 2 (100%+)
Default

Quote:
Originally Posted by UltraLineMotors View Post
Hint the price That's why there a little cheeper then the Yeah Racing Lipos. Yeah Racing 4000mAh has a HARD Case.
Yeah, problem is the 4000mAhs do not fit the M03...
stocker is offline   Reply With Quote
Old 09-13-2008, 07:56 AM   #156
Tech Regular
 
Dan/Ultraline's Avatar
 
Join Date: Mar 2006
Location: Topeka, Ks
Posts: 360
Trader Rating: 1 (100%+)
Send a message via AIM to Dan/Ultraline Send a message via MSN to Dan/Ultraline Send a message via Yahoo to Dan/Ultraline
Default

bummer these are some great batteries.

Quote:
Originally Posted by stocker View Post
Yeah, problem is the 4000mAhs do not fit the M03...
__________________
Dan Filbert
www.ultralinehobbies.com
Dan/Ultraline is offline   Reply With Quote
Old 09-14-2008, 02:26 AM   #157
Tech Initiate
 
Join Date: Oct 2005
Posts: 23
Default

Yep, they definitely do not have hard cases. I run them in a 1/8th scale buggy and thus need 2 of them to fit into a single battery tray.

I forgot that Yeah do have hard cases as I remove the hard case the moment I get them.

I am not sure how much a hard case would protect a battery anyway. I had one of my batteries come loose and rest on the spur, which not surprisingly cut into the battery exposing the inners. Unless the hard case was made from steel or titanium, I expect my spur would have cut through any plastic case (my spur is hardened steel spinning at 12500 rpm).

Looks like the inside of my LiPo was made up of thin layers of copper sheets with some black paste between the copper sheets. Under heavy load the black paste goes liquid, in a rested state it is pretty solid.

Even though the battery has a slice in it and lost some of its content it has not lost much capacity (its now a 3900 mah battery instead of a 4000) and it still delivers 25C. I put 2 layers of clear heatshrink around it so it does not ooze too much black goo out while racing and I can keep an eye on it.
JorgD is offline   Reply With Quote
Old 09-14-2008, 02:58 AM   #158
Tech Addict
 
Join Date: Jun 2008
Posts: 538
Trader Rating: 2 (100%+)
Default

Why do you remove the hard case?

I have chassis-es that have the ribs as they were designed for the side-by-side and/or stick pack sub-Cs. I would prefer not to cut it as they may violate certain race rules so I thought the hard cases would come in useful in such applications.
stocker is offline   Reply With Quote
Old 09-14-2008, 03:09 AM   #159
Tech Initiate
 
Join Date: Oct 2005
Posts: 23
Default

I need to put 2 LiPo's on top of each other into a single battery tray, and keeping the hard cases makes it too thick to fit in. The battery itself is only 13mm thick, thus I can fit 2 of them at 26mm into a single battery tray.

My vehicle runs at 14.8v.

I tried keeping the hard case inititally and made up a new battery strap to cater for having 2 batteries in 1 bay, but then my body did not fit on. I then modified the vehicle to raise the body, but it handled terribly with that configuration, so the easiest way was to ditch the hard cases.
JorgD is offline   Reply With Quote
Old 09-14-2008, 04:31 AM   #160
Tech Elite
 
BSchorr's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2004
Location: Sioux Falls, SD
Posts: 4,820
Trader Rating: 92 (100%+)
Send a message via AIM to BSchorr Send a message via Yahoo to BSchorr Send a message via Skype™ to BSchorr
Default

Any plans on when these are going to be sent in for ROAR approval?

Also... does the 4000 lipo have the cell dimples on the bottom like the 3200 lipo??

And... Can you special order the 4000 to have the wires come out a top corner instead of the end middle? Reason I ask, is because I am planning on using these packs for practice in my B4/T4 and where the wires are coming out right now.. you either have foam there, or the end of the battery tray.
__________________
Proline ~ Genesis R/C Products ~ First Premier Satellites

Last edited by BSchorr; 09-14-2008 at 05:14 AM.
BSchorr is offline   Reply With Quote
Old 09-14-2008, 09:47 AM   #161
Tech Regular
 
Dan/Ultraline's Avatar
 
Join Date: Mar 2006
Location: Topeka, Ks
Posts: 360
Trader Rating: 1 (100%+)
Send a message via AIM to Dan/Ultraline Send a message via MSN to Dan/Ultraline Send a message via Yahoo to Dan/Ultraline
Default

Nothing on ROAR yet.

These do have the dimples like the 3300 and 3600mAh packs.

Next order I will ask about the wires for ya.

Quote:
Originally Posted by BSchorr View Post
Any plans on when these are going to be sent in for ROAR approval?

Also... does the 4000 lipo have the cell dimples on the bottom like the 3200 lipo??

And... Can you special order the 4000 to have the wires come out a top corner instead of the end middle? Reason I ask, is because I am planning on using these packs for practice in my B4/T4 and where the wires are coming out right now.. you either have foam there, or the end of the battery tray.
__________________
Dan Filbert
www.ultralinehobbies.com
Dan/Ultraline is offline   Reply With Quote
Old 09-14-2008, 07:51 PM   #162
Tech Initiate
 
Join Date: Oct 2005
Posts: 23
Default

To get batteries ROAR approved you need to supply ROAR with 4 batteries and $250. They approve batteries twice a year.

In the current short product life-cycles of LiPo batteries due to them being new technology which is improving every few months and the long lead time for ROAR approval many manufacturers appear to find it pointless in getting their batteries approved. By the time they are approved they have already replaced them with better batteries which then need approval.

ROAR should be approving batteries on a monthly basis if they are serious about getting manufacturer interest in having their batteries approved.
JorgD is offline   Reply With Quote
Old 09-18-2008, 04:32 AM   #163
Tech Addict
 
Born2Run's Avatar
 
Join Date: Jul 2007
Location: Europe
Posts: 737
Default

Has anybody tried the "new" 4000mAh 25C lipo? Any reports?
__________________
Whatever
Born2Run is offline   Reply With Quote
Old 09-18-2008, 06:14 AM   #164
Tech Elite
 
BSchorr's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2004
Location: Sioux Falls, SD
Posts: 4,820
Trader Rating: 92 (100%+)
Send a message via AIM to BSchorr Send a message via Yahoo to BSchorr Send a message via Skype™ to BSchorr
Default

I hope to pick up 2 of them after I attend the Region 8 Roar Indoor Offroad race October 2-5th
__________________
Proline ~ Genesis R/C Products ~ First Premier Satellites
BSchorr is offline   Reply With Quote
Old 09-19-2008, 04:07 AM   #165
Tech Addict
 
Born2Run's Avatar
 
Join Date: Jul 2007
Location: Europe
Posts: 737
Default

Quote:
Originally Posted by Born2Run View Post
Has anybody tried the "new" 4000mAh 25C lipo? Any reports?
Nobody yet? Come on guys.I don't want to be the first this time.
__________________
Whatever
Born2Run is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Yeah Racing HARD Case 4000mAh 25C 7.4v Lipo Dan/Ultraline Electric Off-Road 46 08-07-2009 07:51 AM
28c 4000Mah Hard Case Lipos In Stock dgullickson Commercial Marketplace 0 04-28-2008 08:15 PM
Common Sense RC, "hard case" 4400 mah lipo. mrrcguy Electric On-Road 3 12-29-2007 09:53 AM
"""NEW""" Collari .21 3 port buggy motor lc21-b3 goneRVing R/C Items: For Sale/Trade 7 12-20-2006 06:25 PM
""" XRAY FK05 """ excellent cond/super clean/stock evostyle R/C Items: For Sale/Trade 9 06-29-2006 10:04 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 01:56 AM.


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