Fun, Learning, Friendship and Mutual Respect
START  HERE


Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters


500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.


Reply
 
Thread Tools Display Modes
Old 04-02-2009, 07:34 PM   #1
Slyster
Registered Users
 
Posts: 38,842
 
My HF Map location
Join Date: May 2008
Location: Maplewood, MN
Default Charger "Lipo dishcarge" feature goes to 3.0V per cell?

OK.. cycling my new 3300's a couple of times... "Lipo storage" wants to go down to 3.8V/cell and "Lipo Dishcharge" wants to go down to 3.0V/cell.

Isn't 3.0V too low? Or is that considered an empty Lipo (but still safe)
__________________
"It's not just a hobby... it's a lifestyle" - Pete Team Outrage.
Goblin 500 + 700 / O550 / Blade 130x + MCPX BL / SK540 / Jive / DX8 / Quantum / RJX / 4010Duo
Slyster is offline        Reply With Quote
Old 04-02-2009, 07:41 PM   #2
Ultraviolet
Registered Users
 
Posts: 1,546
 

Join Date: Mar 2006
Location: Chicago
Default

3.0 V / cell would be an overdischarge. I would not want to go lower than the nominal voltage of the cell ( 3.7 V ).

Keep a close eye on those Turnigy's.
Ultraviolet is offline        Reply With Quote
Old 04-02-2009, 08:08 PM   #3
Slyster
Registered Users
 
Posts: 38,842
Thread Starter Thread Starter
 
My HF Map location
Join Date: May 2008
Location: Maplewood, MN
Default

Thanks UV Sounds like a plan. I'll stop them at 3.7v and charge to full again. I wonder how many cycles I should do before flying the new lipos? Anyone?

EDIT: I keep forgetting there is a battery forum on helifreaks.. I best be off there.. no doubt all these questions are common.
__________________
"It's not just a hobby... it's a lifestyle" - Pete Team Outrage.
Goblin 500 + 700 / O550 / Blade 130x + MCPX BL / SK540 / Jive / DX8 / Quantum / RJX / 4010Duo
Slyster is offline        Reply With Quote
Old 04-02-2009, 08:32 PM   #4
Penguin
Registered Users
 
Posts: 1,508
 
My HF Map location
Join Date: Jul 2008
Location: Huntsville, AL
Default

Why don't you cycle them with some short easy flights?
__________________
B400 - 122/10 | T250 - 142/5 | T450 - 123/6 | T450 Pro - 67/2 | T600N - 52/0 | O550 86/0 | T700EC - 116/2 | T500 - 314/2 | L500 3D - 169/1 | L600 SE - 43/0
Penguin is offline        Reply With Quote
Old 04-02-2009, 08:55 PM   #5
legine
Registered Users
 
Posts: 1,257
 

Join Date: Jul 2008
Location: Sydney, Australia
Default

thats what i want to do, in normal mode with throttle at like 50 just hover for a few minutes for the first few cycles.....would that be ok?

Thanks, Daniel
__________________
Daniel
DX7 - Mode 1
TREX 450 PRO!! - GP750 & DS520 - HS65's - AR6100 - Scorpion -8, Align speedy
legine is offline        Reply With Quote
Old 04-02-2009, 09:05 PM   #6
marchambault
Registered Users
 
Posts: 1,313
 
My HF Map location
Join Date: Feb 2007
Location: Vancouver Isl
Default

Quote:
Originally Posted by legine View Post
thats what i want to do, in normal mode with throttle at like 50 just hover for a few minutes for the first few cycles.....would that be ok?

Thanks, Daniel
That would be great.

There's really no reason to loose a few cycles to cycling.
marchambault is offline        Reply With Quote
Old 04-02-2009, 10:53 PM   #7
Slyster
Registered Users
 
Posts: 38,842
Thread Starter Thread Starter
 
My HF Map location
Join Date: May 2008
Location: Maplewood, MN
Default

Sounds good. I'll just cycle all 4 lipos just one time.. and then do some easy flying for a few minutes each... so I can at least some flight time on their 2nd cycle.
__________________
"It's not just a hobby... it's a lifestyle" - Pete Team Outrage.
Goblin 500 + 700 / O550 / Blade 130x + MCPX BL / SK540 / Jive / DX8 / Quantum / RJX / 4010Duo
Slyster is offline        Reply With Quote
Old 04-03-2009, 04:47 PM   #8
ferret30
Registered Users
 
Posts: 1,185
 
My HF Map location
Join Date: Apr 2007
Location: Seattle
Default

Quote:
Originally Posted by Ultraviolet View Post
3.0 V / cell would be an overdischarge. I would not want to go lower than the nominal voltage of the cell ( 3.7 V ).

Keep a close eye on those Turnigy's.
What? 3.7v? I don't think that sounds right. Isn't 3.2v more of a safe low limit for LiPos? 3.0v is borderline.
ferret30 is offline        Reply With Quote
Old 04-03-2009, 05:22 PM   #9
Slyster
Registered Users
 
Posts: 38,842
Thread Starter Thread Starter
 
My HF Map location
Join Date: May 2008
Location: Maplewood, MN
Default

I don't know. I just know I always fly until the resting voltage is 3.8V per cell.. maybe 3.7V.

I bought one of these... this should help.. friends got one and it's REALLY cool.

http://www.hobbycity.com/hobbycity/s...idProduct=6232
__________________
"It's not just a hobby... it's a lifestyle" - Pete Team Outrage.
Goblin 500 + 700 / O550 / Blade 130x + MCPX BL / SK540 / Jive / DX8 / Quantum / RJX / 4010Duo
Slyster is offline        Reply With Quote
Old 04-03-2009, 05:44 PM   #10
JackdaWack
Registered Users
 
Posts: 2,083
 

Join Date: Jan 2009
Location: NJ
Default

They make smaller similar units like the blinky balancer which essencially do the same thing. but for about 30 bucks, you get a reading to the 100th decimal, unlike to the thousands like this one.
__________________
Trex 500 Esp, CC Ice 75, Hyperion 1600kv, Gp750, Ds510's , Ar6200, DS650 tail mod.
DX7
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.

Hyperion 250w 6s Charger, Hyperion G3 Battaries
ParkZone T-28 w/ custom flaps+retracts, Ar7000
6s RCLander F-16 - To scared to maiden
JackdaWack is offline        Reply With Quote
Old 04-03-2009, 05:45 PM   #11
clayboy
Registered Users
 
Posts: 573
 
My HF Map location
Join Date: May 2006
Location: phuket , thailand
Default

as far a s i know it is safe to discharge to 3v,if the charger is accurate it should not be a problem.
have not heared abut any lipo that would get damaged with a discharge to max 3v or charged to max 4.2
clayboy is offline        Reply With Quote
Old 04-03-2009, 05:54 PM   #12
clayboy
Registered Users
 
Posts: 573
 
My HF Map location
Join Date: May 2006
Location: phuket , thailand
Default

Quote:
Originally Posted by Slyster View Post
I don't know. I just know I always fly until the resting voltage is 3.8V per cell.. maybe 3.7V.

I bought one of these... this should help.. friends got one and it's REALLY cool.

http://www.hobbycity.com/hobbycity/s...idProduct=6232
if u want to get max out and want to be safe i would recomend lipodimatic to monitor each cell in the pack during flights. it makes sure no cell will drop to much under load.

i use them in all my helis. still fly with timer but some times when i fly harder then normal it is a grate insurance not to drain the pack to much
clayboy is offline        Reply With Quote
Old 04-03-2009, 06:23 PM   #13
ChasHeliCop
HF Support
 
Posts: 4,899
 
My HF Map location
Join Date: May 2007
Location: Charleston, SC, USA
Default

3.0 to 3.2 v/c is basically the standard for MAX safe discharge of a lipo. I never run mine below 3.7v/c when flying. To cycle them, I fly mild flights and cut my timer in half. Usually 2.5 to 2.75 min. and cycle 5 times, then let it rip. That's about what I have read over the years, with slight variations, but I have never had any problems with my lipos either. Hope you enjoy the 500, know you will.
__________________
Sponsored by Visa/MasterCard / Team Budweiser / Trojan Field Rep
Donut Connoisseur
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.


HELI-FREAK, You couldn't have picked a better place to land !
ChasHeliCop is offline        Reply With Quote
Old 04-04-2009, 07:58 AM   #14
Bob O
HF Support
 
Posts: 26,681
 
My HF Map location
Join Date: Dec 2008
Location: Negaunee, Michigan
Default

I think 50% power would be too little for safe hovering. My buddy Nate had a great idea for breaking in new packs. He suggested setting a throttle curve for 50% at midstick and just let it sit on the ground for 5 to 10 minutes depending upon how much you want to discharge it.

An option would be to throw the packs in a plane and do some leisurely flying for about 10 minutes. I didn't have the patience to do either, I just threw the packs on the heli and went for it. Granted I'm using $18 Zippy's. If I spent $80 per battery I'd probably break them in properly.
__________________
):> Team HeliFreak
SPARTANRC - R&D Team
GAUI X4II - VX1e, WARP 360 - VX1n
Futaba 14SG
Bob O is offline        Reply With Quote
Reply




Unregistered
Go Back   HeliFreak > R/C Helicopter Support > 500 Class Electric Helicopters


500 Class Electric Helicopters 500 Class Electric Helicopters manufactured by Align, Tarot, SYMA, Airhog, Chaos, HK and similar.

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 Off

Forum Jump


Copyright © 2004-2011 - William James - Helifreak.com