R/C Tech Forums

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

Reply
 
Thread Tools Search this Thread
Old 03-02-2012, 11:26 AM   #1
Tech Regular
 
AErckidd's Avatar
 
Join Date: Nov 2011
Posts: 267
Trader Rating: 8 (100%+)
Default LiFe Battery

I just picked up a new 1850 mAh 6.6v LiFe battery but I'm not sure what the low voltage cutoff should be? Does anyone know? Thanks!
__________________
l DESC210R l
Team Durango www.team-durango.com
TrakPower www.trakpowerusa.com
Radiopost www.radiopost.com
AErckidd is offline   Reply With Quote
Old 03-02-2012, 11:28 AM   #2
Tech Fanatic
 
Join Date: Oct 2011
Location: Round Lake, IL
Posts: 875
Trader Rating: 13 (100%+)
Default

Same as LiPo, 3.2v/cell.
__________________
TRX E-Maxx - KD 2039kv/HW 150A | TRX Summit - DeWalt 14.4v/TRX EVX2
TRX Slashapede 4x4 - Vel. 3500/HW SC-8 | TRX Stampede 4x4 - Vel. 3500/BL Hobbies 120A
TRX Slash 4x4 Ult. - HS 3500kv/HW SC-8 | Losi E-Muggy - Leopard 2000kv/HW 150A
Tam. Stad. Blitzer - KT 19T/HW 1060 | Ofna Ultra LX2-E - TP 2400kv/HW SC-8
WindDrake is offline   Reply With Quote
Old 03-02-2012, 12:31 PM   #3
Tech Regular
 
AErckidd's Avatar
 
Join Date: Nov 2011
Posts: 267
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by WindDrake View Post
Same as LiPo, 3.2v/cell.
It's 2 cell, so it'd be a 6.4v cutoff? It starts at only 6.6v though.
__________________
l DESC210R l
Team Durango www.team-durango.com
TrakPower www.trakpowerusa.com
Radiopost www.radiopost.com
AErckidd is offline   Reply With Quote
Old 03-02-2012, 01:12 PM   #4
Tech Regular
 
Join Date: Jan 2008
Location: Cleveland, Ohio
Posts: 402
Trader Rating: 7 (100%+)
Default

6.6 is not the charged voltage. The charged voltage is 7.2 if I read correctly. -Just like 7v is the cutoff for LiPo and 7.6 is the storage voltage...

In some searching the cutoff is more like 4.6 volts for the pack, or 2.3 volts per cell, though I keep reading 2.0 volts as the bottom limit.
MikeInCtown is offline   Reply With Quote
Old 03-02-2012, 01:28 PM   #5
Tech Regular
 
Buggy Brad's Avatar
 
Join Date: Nov 2007
Location: NewHampshire
Posts: 418
Default

No cut-off, what will kill them is sitting at very low to 0 volts for a long period of time. Like if you killed the battery then forgot and and left the car "ON". When the cells reach 2.0 volts you have used 95%. I ran them for years with no cut-off and all my A-123's still perform great and most have over 1000 cycles.......BB
__________________
.....It's not a problem until it's on fire....
Buggy Brad is offline   Reply With Quote
Old 03-02-2012, 03:26 PM   #6
Tech Fanatic
 
Join Date: Oct 2011
Location: Round Lake, IL
Posts: 875
Trader Rating: 13 (100%+)
Default

I actually misremembered in my earlier post.

It's 2.8v-3v/cell. A lot of folks don't bother with a cutoff, as the thing they are powering will often lose power function at or just below cutoff. 2.8 is the bottom limit.

http://en.wikipedia.org/wiki/Lifepo4
__________________
TRX E-Maxx - KD 2039kv/HW 150A | TRX Summit - DeWalt 14.4v/TRX EVX2
TRX Slashapede 4x4 - Vel. 3500/HW SC-8 | TRX Stampede 4x4 - Vel. 3500/BL Hobbies 120A
TRX Slash 4x4 Ult. - HS 3500kv/HW SC-8 | Losi E-Muggy - Leopard 2000kv/HW 150A
Tam. Stad. Blitzer - KT 19T/HW 1060 | Ofna Ultra LX2-E - TP 2400kv/HW SC-8
WindDrake is offline   Reply With Quote
Old 03-02-2012, 06:32 PM   #7
Tech Regular
 
Tomac2's Avatar
 
Join Date: Nov 2011
Location: Cranbourne
Posts: 369
Trader Rating: 7 (100%+)
Default

Iv got a LiFe battery in my transmitter & Iv set the cut off at 6.6v.
http://www.ebay.com.au/sch/i.html?_t...4.l1581&_pgn=2

According to the info above, I think this means I can safely go as low as 6v ?
Tomac2 is offline   Reply With Quote
Old 03-02-2012, 07:23 PM   #8
Tech Regular
 
AErckidd's Avatar
 
Join Date: Nov 2011
Posts: 267
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by Tomac2 View Post
Iv got a LiFe battery in my transmitter & Iv set the cut off at 6.6v.
http://www.ebay.com.au/sch/i.html?_t...4.l1581&_pgn=2

According to the info above, I think this means I can safely go as low as 6v ?
Yeah, I'm more than likely going to just set it at like 6v and it should be fine.
__________________
l DESC210R l
Team Durango www.team-durango.com
TrakPower www.trakpowerusa.com
Radiopost www.radiopost.com
AErckidd is offline   Reply With Quote
Old 03-02-2012, 07:25 PM   #9
Tech Master
 
ViGiLaNtE351's Avatar
 
Join Date: Oct 2011
Location: West Sydney, Originally from Tas
Posts: 1,084
Trader Rating: 10 (100%+)
Default

Quote:
Originally Posted by WindDrake View Post
I actually misremembered in my earlier post.

It's 2.8v-3v/cell. A lot of folks don't bother with a cutoff, as the thing they are powering will often lose power function at or just below cutoff. 2.8 is the bottom limit.

http://en.wikipedia.org/wiki/Lifepo4
"Misremembered"? You mean "Forgot"? LOL.
__________________
NSW State Titles Top 10 Finalist in 2WD and 4WD Stock 2012.
Ryde Club - 2WD Stock and 4WD Mod 2012 Winner
YOKOMO BMAX2 2012 - Trinity EPIC ReVtech 10.5t - LRP SXX V2
YOKOMO BMAX4 II Factory 2011 - Trinity EPIC ReVtech 10.5t - LRP SXX V2
LOSI JRX PRO / JRX PRO SE / RC10 Team Graphite Stealth / TAMIYA FOXES - Various.
ViGiLaNtE351 is offline   Reply With Quote
Old 03-03-2012, 04:39 AM   #10
Tech Regular
 
Tomac2's Avatar
 
Join Date: Nov 2011
Location: Cranbourne
Posts: 369
Trader Rating: 7 (100%+)
Default

Quote:
Originally Posted by AErckidd View Post
Yeah, I'm more than likely going to just set it at like 6v and it should be fine.
6v it its then

cheers
Tomac2 is offline   Reply With Quote
Old 03-03-2012, 08:59 AM   #11
Tech Regular
 
AErckidd's Avatar
 
Join Date: Nov 2011
Posts: 267
Trader Rating: 8 (100%+)
Default

Quote:
Originally Posted by ViGiLaNtE351 View Post
"Misremembered"? You mean "Forgot"? LOL.
__________________
l DESC210R l
Team Durango www.team-durango.com
TrakPower www.trakpowerusa.com
Radiopost www.radiopost.com
AErckidd is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
4pk Life battery problem Meradin Radio and Electronics 15 05-22-2011 10:06 AM
rx life battery boomtheroom Nitro Off-Road 26 05-07-2011 05:01 AM
LiFe battery for M11x? jmaxey51 Radio and Electronics 16 03-02-2011 03:02 PM
Savage Flux HP and Life Battery Dorion Monster Trucks 9 12-22-2010 02:39 PM
Maxamps Life Battery packs lookieaefanboi Electric Off-Road 24 08-07-2009 06:26 AM



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 02:21 PM.


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