lipos will not fully charge?

hawkins221 · 01-21-2010, 01:35 PM

how to balance 1 cell at a time? i have 2x4s 4000mah that i use as 8s for my logo500
the cells are like so 4,16 4,16 4,16 4,18 4,16 4,18 4,19,4,20
and i,ts dropped to 0,1A charging power, i have set it to charge at 3.0A
its been charging for hours and will not finish it off? why?
can i do one cell at a time?
i use a g,t,power charger from hobbycity
any help would be great guys

Slyster · 01-21-2010, 01:36 PM

I suggest you have a little blinky balancer on hand. You hook them up and it brings all cells DOWN to the lowest cell. Then charge back up with charger.

Michaelinpr · 01-22-2010, 10:11 AM

Thanks Slyster. I tried that on a 11.1V lipo. I could leave the thing for hours with out it balancing. Worked like a charm.

RocketSled · 01-22-2010, 10:44 AM

Some chargers limit how "hard" they will work to reach balance if the temperature is too low. I sometimes have trouble getting a full charge on my batteries using my FMA charger because I leave it in the unheated garage.

Teej · 01-22-2010, 10:52 AM

You have one cell that is at its max safe charge - 4.2.

Thus the charger is limiting the current to .1 A because the balancer has to keep bleeding off of the high cell to allow the weaker cells to catch up.

If it were to be run at 3A right now, one of two things would happen - either the balancer would burn out from being forced to drain off too much current....or the high cell would exceed 4.2v.

The link to the manual is broken or I would have checked for you...but look and see if there's an option to run the balance mode without it actually charging. If there is...start the balance mode and just let it run. When it finishes, then you can top up the charge.

If it can't be set to balance without charging then either

A: Take the other suggestion and get an external balancer

B: Go out now and fly about half the time you normally would...then put it back on the charger/balancer at a lower starting current (maybe 1A)

C: Just let it run another hour or two and then check the voltages again if it hasn't finished. It should finish. You have at worst a .04 difference. That's not too bad.

hawkins221 · 01-22-2010, 12:15 PM

hi guys think it,s fixed now
i took my lipos to work with my and did them one by one on the trusty old blinky balancer, now at home and heard my charger beep that it has fully charged my lipos
yehhhhhhh! thanks mega big amounts, blinky rules!!!!

hawkins221 · 01-22-2010, 01:07 PM

[QUOTE=Teej;1792118]

A: Take the other suggestion and get an external balancer

QUOTE]
how about my blinky? i can set my charger for
charge+balance
or just charge and no balance
so if i use charge no balance can i stick my blinky in there?

Teej · 01-22-2010, 01:18 PM

Absolutely. The blinky is what I referred to as "the other suggestion".

I'm personally not familiar with the blinky - my only charger & balancer are TP 1010 & 210.

hawkins221 · 01-22-2010, 01:21 PM

thanks glad my lipos are o,k and not duds
anyhows you rock thanks more mega much dude.

01-21-2010, 01:35 PM	#1
hawkins221 Registered Users Join Date: Jan 2008 Location: amsterdam	lipos will not fully charge? how to balance 1 cell at a time? i have 2x4s 4000mah that i use as 8s for my logo500 the cells are like so 4,16 4,16 4,16 4,18 4,16 4,18 4,19,4,20 and i,ts dropped to 0,1A charging power, i have set it to charge at 3.0A its been charging for hours and will not finish it off? why? can i do one cell at a time? i use a g,t,power charger from hobbycity any help would be great guys

01-21-2010, 01:36 PM	#2
Slyster Registered Users My HF Map location Join Date: May 2008 Location: Maplewood, MN	I suggest you have a little blinky balancer on hand. You hook them up and it brings all cells DOWN to the lowest cell. Then charge back up with charger. __________________ It's not just a hobby... it's a lifestyle! Outrage Fusion & 550 / Goblin 700 / SK540 / Kontronik / DX8 / Quantum / RJX / 4010 Duo Pete Team Outrage.

01-22-2010, 10:44 AM	#4
RocketSled Registered Users Join Date: Sep 2008	Some chargers limit how "hard" they will work to reach balance if the temperature is too low. I sometimes have trouble getting a full charge on my batteries using my FMA charger because I leave it in the unheated garage. __________________ Fly in the street hangar includes: T-Rex 450SEV2, 250SE (MD500), Blade 400, SR & mSR & 120SR & mCPx & mCX & CX2, Walkera 4G6S & SeaCobra Parkzone Sukhoi (& XP), Centurion, Mustang (Micro and BL versions), µBeast, Mosquito

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01-22-2010, 10:11 AM	#3
Michaelinpr Registered Users Join Date: Mar 2009 Location: Puerto Rico	Thanks Slyster. I tried that on a 11.1V lipo. I could leave the thing for hours with out it balancing. Worked like a charm.

01-22-2010, 10:52 AM	#5
Teej Registered Users Join Date: Jul 2006 Location: Wisconsin	You have one cell that is at its max safe charge - 4.2. Thus the charger is limiting the current to .1 A because the balancer has to keep bleeding off of the high cell to allow the weaker cells to catch up. If it were to be run at 3A right now, one of two things would happen - either the balancer would burn out from being forced to drain off too much current....or the high cell would exceed 4.2v. The link to the manual is broken or I would have checked for you...but look and see if there's an option to run the balance mode without it actually charging. If there is...start the balance mode and just let it run. When it finishes, then you can top up the charge. If it can't be set to balance without charging then either A: Take the other suggestion and get an external balancer B: Go out now and fly about half the time you normally would...then put it back on the charger/balancer at a lower starting current (maybe 1A) C: Just let it run another hour or two and then check the voltages again if it hasn't finished. It should finish. You have at worst a .04 difference. That's not too bad.

01-22-2010, 12:15 PM	#6
hawkins221 Registered Users Thread Starter Join Date: Jan 2008 Location: amsterdam	hi guys think it,s fixed now i took my lipos to work with my and did them one by one on the trusty old blinky balancer, now at home and heard my charger beep that it has fully charged my lipos yehhhhhhh! thanks mega big amounts, blinky rules!!!!

01-22-2010, 01:07 PM	#7
hawkins221 Registered Users Thread Starter Join Date: Jan 2008 Location: amsterdam	[QUOTE=Teej;1792118] A: Take the other suggestion and get an external balancer QUOTE] how about my blinky? i can set my charger for charge+balance or just charge and no balance so if i use charge no balance can i stick my blinky in there?

01-22-2010, 01:18 PM	#8
Teej Registered Users Join Date: Jul 2006 Location: Wisconsin	Absolutely. The blinky is what I referred to as "the other suggestion". I'm personally not familiar with the blinky - my only charger & balancer are TP 1010 & 210.

01-22-2010, 01:21 PM	#9
hawkins221 Registered Users Thread Starter Join Date: Jan 2008 Location: amsterdam	thanks glad my lipos are o,k and not duds anyhows you rock thanks more mega much dude.