Help with batterie(s) Blade CX  
View related threads: (in this forum | in all forums)

Tower Hobbies
Enter up to 4 keywords or Tower stock numbers
Logged in as Guest



Users viewing this topic: none
  Printable Version
       

All Forums >> RC Helicopters >> Electric RC Helis >> E-Flite Helicopters >> Help with batterie(s) Blade CX
Page: [1]

Login
Message << Older Topic   Newer Topic >>
Help with batterie(s) Blade CX - 6/9/2008 12:18:59 AM   
chriskim95


 

Posts: 45
Joined: 11/28/2007
From: chantilly, VA, USA
Status: offline 		Help!! My batteries are not in balance. I use my batteries for about 5 minutes until they are just above the low voltage cutoff. I wanted to check my balance of my batteries. One of them was 7.4 and the other was 3.89 I balanced them out useing eat2muchrice's tutorial. Once I balanced them both out to 3.89, I plugged them into my stock e-flite charger. When they were done charging, they were 7.4 and 3.89 after flying AGAIN!! Ive tried this with both of my batteries. Is my charger bad?
       Post #: 1

RE: Help with batterie(s) Blade CX - 6/9/2008 1:42:33 AM   
Crusader23



Posts: 286
Joined: 2/12/2008
From: Fountain, CO, USA
Status: offline 		You need to recheck which wires you're checking your voltage for. 7.4 sounds like the total voltage and 3.89 is one of the cell's voltage. Double check to make sure you're checking the correct cell voltage.

_____________________________

4 more months and I''ll be home

(in reply to chriskim95)
       Post #: 2

RE: Help with batterie(s) Blade CX - 6/9/2008 1:55:52 AM   
chriskim95


 

Posts: 45
Joined: 11/28/2007
From: chantilly, VA, USA
Status: offline 		i checked the red black and the red blue... is that the right ones?

(in reply to Crusader23)
       Post #: 3

RE: Help with batterie(s) Blade CX - 6/9/2008 7:56:39 AM   
eat2muchrice



Posts: 846
Joined: 11/8/2007
From: Novato, CA, USA
Status: offline 		NO! you tested the wrong wires. Crusader is right, recheck your wires.
There are three wires that go into the charger plug. What you should get is three different readings with your voltameter.
red=left, blue=mid, black=right
To check each cell
Cell 1 red+blue=4.2v
Cell 2 blue+black=4.2v
Note: red+black = The total amount of voltage in both cells 8.4v.
Here is the link again. Look very closely at the pictures.
Eat2muchrice’s Cheap Battery Test and Fix
http://www.rcuniverse.com/forum/m_6970199/tm.htm
Good luck.

_____________________________

<<--- My dogs first look and sniff at her worst nightmare.

(in reply to chriskim95)
       Post #: 4

RE: Help with batterie(s) Blade CX - 6/9/2008 4:43:00 PM   
ArrowNaughtic



Posts: 1762
Joined: 11/20/2006
From: Kent, WA, USA
Status: offline 		At 7.4V total and the first cell only reading 3.89V that leaves the second cell with a voltage of 3.51V. That is NOT in balance and is off by a larger margin than what most consider to be a balanced set of cells. Readings for both fresh off the charger should be closer to the 4.2V per cell and not at 3.8V and 3.5V.
Please check them as soon as you finish charging them and let us know the readings of both cells and total voltage. I am hoping you will be showing a 4.2V per cell and a 8.4V for the total of the pack. eat2muchs tutorial is spot on and should help you determine if the charger is the culprit or just the way your heli draws from the cells. Five minutes is at the low end of flight times for the stock lipos and could be a warning sign of something else happening in your heli. (motors, servos, ect) I only get 5 minutes out of mine but I am also running LED's on my CX2, without them I get the full 8 - 10 minutes of flight.


_____________________________________________________________________________________


Of all the things I ever lost....................................... I miss my mind the most!

(in reply to eat2muchrice)
       Post #: 5

RE: Help with batterie(s) Blade CX - 6/9/2008 10:59:24 PM   
chriskim95


 

Posts: 45
Joined: 11/28/2007
From: chantilly, VA, USA
Status: offline 		whats the in margin of balancing my lipos?? Im at about 3.80 and 3.84... is that close enough?

(in reply to ArrowNaughtic)
       Post #: 6

RE: Help with batterie(s) Blade CX - 6/10/2008 6:29:43 AM   
eat2muchrice



Posts: 846
Joined: 11/8/2007
From: Novato, CA, USA
Status: offline
quote:

ORIGINAL: chriskim95

whats the in margin of balancing my lipos?? Im at about 3.80 and 3.84... is that close enough?


That will hurt your flying time by alot. On a full charge they should read at 4.2v each.

_____________________________

<<--- My dogs first look and sniff at her worst nightmare.

(in reply to chriskim95)
       Post #: 7

RE: Help with batterie(s) Blade CX - 7/16/2008 7:03:31 PM   
chriskim95


 

Posts: 45
Joined: 11/28/2007
From: chantilly, VA, USA
Status: offline 		wow this charger is wierd, Oh well, I'm getting a TP1010C with a TP-205V from a friend for 50 bucks.... Yeah, the flight times suck, I wish I had better flight times. I currently have a HeliMax charger and am wondering if I can just balance the li-pos and charge them from the JST connectors...

(in reply to eat2muchrice)
       Post #: 8

Page:   [1]
All Forums >> RC Helicopters >> Electric RC Helis >> E-Flite Helicopters >> Help with batterie(s) Blade CX
Page: [1]





Jump to:


Google 



Search | Marketplace | Event Calendar | Local Clubs | Magazine | Product Ratings | New Products | Discussion Forums

Photo Gallery | Member Video Posts | RCU Video Gallery | Instructor Search | Field|Track|Marina Search

Advertisers | Hobby Vendor Resources | Rate Manufacturers | Sign In/Sign Up

SITE MAP!   : :   FORUM RULES

© 2001 - 2007 24-7 RC, LLC, all rights reserved.

Charities we support that also need your help
Yorkie Rescue | Humane Society | ASPCA | Crohn's-Colitis America

Kaango.com Classifieds

0.859RCU1