R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 10-04-2013, 09:23 AM   #511
Tech Regular
 
Conrad's Avatar
 
Join Date: Jun 2005
Location: Scotland
Posts: 460
Trader Rating: 2 (100%+)
Default

For those with the 4010duo or even 308b for that matter, how noisy is the charger when in use. Do the fans spin up alot when charging?
__________________
Swith Racing [www.swithracing.co.uk]
Conrad is offline   Reply With Quote
Old 10-04-2013, 09:49 AM   #512
Tech Master
 
Jerz616's Avatar
 
Join Date: Oct 2011
Location: Dallas,TX
Posts: 1,045
Trader Rating: 49 (100%+)
Default

Quote:
Originally Posted by Conrad View Post
For those with the 4010duo or even 308b for that matter, how noisy is the charger when in use. Do the fans spin up alot when charging?
I never even hear my 308. If the room is dead quiet you might hear it a little. But at the track I never do.
__________________
Ryan Gracey

XRAY T4'14/ORCA VXX/ORCA TX 5.0
XRAY XB8'14
Jerz616 is offline   Reply With Quote
Old 10-04-2013, 09:59 AM   #513
Tech Master
 
Travis S's Avatar
 
Join Date: May 2003
Location: Moline, IL
Posts: 1,372
Trader Rating: 46 (100%+)
Default

Quote:
Originally Posted by andrewdoherty View Post
I saw the same numbers on the one I looked at today discharging a 1s and 2s pack after a run. Does anyone have access to a 308 duo to perform the same check? I'm mostly interested in the discharge abilities when only connected to a power supply.
I just got a 308 and tested the discharge and the most I saw it do was 10.7a on 2s packs. It was not a fully charged pack so it might be a bit higher at a point but it does change when the battery volts are lower. I also tried 2 x 2s at a time and it lowered the rate to about 8.5-9a on each at the same time. Then I stopped 1 of them and the other went back to 10.5 range.

The 308 while charging hasn't been noisy at all IMO. Only during this discharge when the fans went to full speed. Other then that it runs pretty quite. It shows the temp of the charger on the front so if it hits X deg then the fan turns up more and more. I think it has like 5 speed settings.
Travis S is offline   Reply With Quote
Old 10-05-2013, 03:13 AM   #514
Tech Regular
 
Conrad's Avatar
 
Join Date: Jun 2005
Location: Scotland
Posts: 460
Trader Rating: 2 (100%+)
Default

Sweet, thanks for the replies guy. I've got a loan of a charger just now as I was waiting on the icharger coming back in stock and the loan charger is so f'ing noisy it's getting on my tits, I didn't want to plump up the cash and have the same noise with the icharger.
__________________
Swith Racing [www.swithracing.co.uk]
Conrad is offline   Reply With Quote
Old 11-02-2013, 04:41 AM   #515
Tech Adept
 
Join Date: Jan 2008
Location: In a house
Posts: 219
Default

So just started reading this only ever charged at 1c my tp 6000 but reading label says
Charge as 2 cell,12c * (72A) or may cause fire
So does this mean max i can charge is 72 amps??
So charging at 10 amps would be fine????
Quietman is offline   Reply With Quote
Old 11-02-2013, 05:09 AM   #516
Regional Moderator
 
CarbonJoe's Avatar
 
Join Date: Jul 2006
Posts: 2,660
Default

Quote:
Originally Posted by Quietman View Post
So just started reading this only ever charged at 1c my tp 6000 but reading label says
Charge as 2 cell,12c * (72A) or may cause fire
So does this mean max i can charge is 72 amps??
So charging at 10 amps would be fine????
Yes and yes.
__________________
*** The Gate - Celebrating 7 years at the same location ***
The difference between genius and stupidity is that genius has its limits. - Albert Einstein
Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car
CarbonJoe is offline   Reply With Quote
Old 11-02-2013, 05:11 AM   #517
Tech Adept
 
Join Date: Jan 2008
Location: In a house
Posts: 219
Default

Quote:
Originally Posted by CarbonJoe View Post
Yes and yes.
Ideal thanks
Quietman is offline   Reply With Quote
Old 11-02-2013, 02:47 PM   #518
Tech Champion
 
Join Date: Feb 2011
Posts: 5,970
Trader Rating: 1 (100%+)
Default

Most big events will limit charge amperage, so getting those million amps chargers will not be necessary !!!!
bertrandsv87 is offline   Reply With Quote
Old 11-02-2013, 03:53 PM   #519
Tech Champion
 
Pulse_'s Avatar
 
Join Date: May 2010
Location: Brussels, Belgium
Posts: 5,081
Default

you don't need massive amperage with a high voltage setup

I charge my 6S 3300mah at 3C (10A). With a 4S I would need a 15A charge to reach 3C. And that's for the exact same runtime on the track
__________________
https://www.youtube.com/channel/UC1CAwFfuz1K3chBSVpIlSew
Pulse_ is offline   Reply With Quote
Old 11-02-2013, 04:20 PM   #520
Tech Elite
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,401
Default

I balance charge at 20amp now for club races on my 306b. The main reason is for convenience. I can run a heat of 17.5 blinky. Toss the battery on the charger and it will be done in 9 minutes. This allows me to do practice runs or test changes between rounds. I also only have one battery. So this helps out a lot. I also charge in a battery box for safety.

So for me, it's all about convenience. There is no performance gain because I am not heating up the battery first by discharging at high amperage and then high amp charging to keep the heat in the pack.
__________________
M.J. McIntyre

Yokomo YRX12
Yokomo YZ-2 DT/CA
JimmyMac is offline   Reply With Quote
Old 11-02-2013, 05:19 PM   #521
Tech Master
 
Join Date: Oct 2011
Location: Anaheim Hills, CA
Posts: 1,254
Trader Rating: 36 (100%+)
Default

Quote:
Originally Posted by Pulse_ View Post
you don't need massive amperage with a high voltage setup

I charge my 6S 3300mah at 3C (10A). With a 4S I would need a 15A charge to reach 3C. And that's for the exact same runtime on the track
I'm right there with ya. It's pretty great. Although I run 1300 6S packs and charge them at a light flickering 6.5 amps, for an 11min charge time.
ufoDziner is offline   Reply With Quote
Old 11-11-2013, 09:21 AM   #522
Tech Elite
 
asc6000's Avatar
 
Join Date: Jan 2011
Location: Meridian Idaho
Posts: 3,386
Trader Rating: 15 (100%+)
Default

Quote:
Originally Posted by JimmyMac View Post
I balance charge at 20amp now for club races on my 306b. The main reason is for convenience. I can run a heat of 17.5 blinky. Toss the battery on the charger and it will be done in 9 minutes. This allows me to do practice runs or test changes between rounds. I also only have one battery. So this helps out a lot. I also charge in a battery box for safety.

So for me, it's all about convenience. There is no performance gain because I am not heating up the battery first by discharging at high amperage and then high amp charging to keep the heat in the pack.
Having a 2nd battery would be even more convenient.
__________________
"you reach the limit, you touch the limit, then you pass the limit, now there is a new limit"
Ayrton Senna
asc6000 is offline   Reply With Quote
Old 11-11-2013, 12:36 PM   #523
Tech Elite
 
JimmyMac's Avatar
 
Join Date: Oct 2001
Location: NC
Posts: 4,401
Default

Quote:
Originally Posted by asc6000 View Post
Having a 2nd battery would be even more convenient.
Depends on the situation.
__________________
M.J. McIntyre

Yokomo YRX12
Yokomo YZ-2 DT/CA
JimmyMac is offline   Reply With Quote
Old 11-11-2013, 03:29 PM   #524
Tech Master
 
Mr RCTech's Avatar
 
Join Date: Dec 2005
Posts: 1,291
Trader Rating: 2 (100%+)
Default

To get the most out of your lipos.

First, buy good quality lipos if your racing.

Discharge only to 3.4 volts per cell (nothing lower)
I prefer to discharge to 3.4 volts per cell only on the first charge.

Charge at 12-20 amps and your good to go.
I prefer 20 amps first charge to heat them up internally.
This lowers the IR on the first charge.

If you don't think its an advantage then discharge your lipo at 30 amps.
And watch the voltage.
It's HUGE!
Mr RCTech is offline   Reply With Quote
Old 11-11-2013, 03:44 PM   #525
Tech Master
 
Join Date: Oct 2011
Location: Anaheim Hills, CA
Posts: 1,254
Trader Rating: 36 (100%+)
Default

Quote:
Originally Posted by Mr RCTech View Post
To get the most out of your lipos.

First, buy good quality lipos if your racing.

Discharge only to 3.4 volts per cell (nothing lower)
I prefer to discharge to 3.4 volts per cell only on the first charge.

Charge at 12-20 amps and your good to go.
I prefer 20 amps first charge to heat them up internally.
This lowers the IR on the first charge.

If you don't think its an advantage then discharge your lipo at 30 amps.
And watch the voltage.
It's HUGE!
The one other thing that I do for life extension/safety is to stop the charge cycle at 4.1 instead of 4.2.
ufoDziner is offline   Reply With Quote
Reply



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 02:09 PM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net