Lipo Troubles

warbird · August 10th, 2009, 18:49

Hey. I bought a brand new 11.1 V 2200mah 15 C King Arms lipo battery. I bought Huangs $45 lipo charger. I balanced the battery, charged it and the tried it out with a protective circuit board. It fired great for the first 50 rounds or so, then it stopped. I balanced it again, charged it and balanced again. I tried it out again and got maybe 20 rounds. When I pull the trigger I hear a click, seems like theres not enough power. Did I do something wrong or are the products defected?

Thanks,
Tim.

m102404 · August 10th, 2009, 18:58

Do you have a volt-meter? Measure each cell and see if they're close to each other (IIRC as you measure each end of the balancer tab the voltages are additive). When fully charged, each cell should be 4.2v MAX...and they should be all the same regardless.

I did just see one where one of the cells was basically dead...the other two would charge to 4.2 (resulting in a 8.4v pack that just wouldn't work well). We kiboshed that pack right away.

Measure it....don't guess.

BeAcH · August 10th, 2009, 21:34

I had the same problem as you, i took out the protective circut board and it works like a dream, i put the protective circut board back in and nothing worked.
So those circut boards are doing somthing, i just run my lipo without using it...no problems.

Kos-Mos · August 11th, 2009, 00:29

FYI no voltmeter under 5000$ will give you a reading significant to check a LiPo...

The protection board can be the cause, but make sure you charge with the CHARGE lead and use the pack with the Output lead.

That is the way most packs are built when using protective boards.

warbird · August 11th, 2009, 07:07

Would you mind being more precise about the different leads? I don't understand what you mean

.

Thanks

warbird · August 11th, 2009, 17:09

It works awesomely without the circuit board! I'm scared of over discharging it though...

ShelledPants · August 11th, 2009, 17:12

Quote:

Originally Posted by warbird

It works awesomely without the circuit board! I'm scared of over discharging it though...

Why? It's not going to explode. It will just mess up the chemistry and ruin the battery. If it bulges. Have it disposed of.

Charge/Balance Before every game.

Charge/Balance After every game.

Don't fire more shots than you have maH (as a rule of thumb).

Edit: Buy a decent charger, digital with readouts. I recommend the ELITE 6i AC/DC Charger + Lipo Balancer from www.cheapbatterypacks.com

Awesome little charger.
You should be fine.

warbird · August 11th, 2009, 18:48

I just don't want to go through batteries like a madman

.

rustysniper · August 11th, 2009, 18:54

from my experience LiPo batteries don't like to be discharged below 9v. Most LiPo chargers have a discharge function...I have discharged batteries to the 9v level and then recharged them and balanced to the 11.1v level and had no problems.....maybe try that....just a thought

warbird · August 11th, 2009, 19:34

It's working fine now, I just won't use the protection circuit board. Thanks for the info guys!

ShelledPants · August 11th, 2009, 19:48

Quote:

Originally Posted by rustysniper

from my experience LiPo batteries don't like to be discharged below 9v. Most LiPo chargers have a discharge function...I have discharged batteries to the 9v level and then recharged them and balanced to the 11.1v level and had no problems.....maybe try that....just a thought

I'd like to clarify that it's 3V per cell, so in the case of an 11.1 it's 9V and a 7.4V it's 6V.

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August 10th, 2009, 18:49	#1
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Lipo Troubles Hey. I bought a brand new 11.1 V 2200mah 15 C King Arms lipo battery. I bought Huangs $45 lipo charger. I balanced the battery, charged it and the tried it out with a protective circuit board. It fired great for the first 50 rounds or so, then it stopped. I balanced it again, charged it and balanced again. I tried it out again and got maybe 20 rounds. When I pull the trigger I hear a click, seems like theres not enough power. Did I do something wrong or are the products defected? Thanks, Tim.

August 10th, 2009, 21:34	#3
BeAcH Trader rating Join Date: Jun 2008 Location: Fort Saint John BC	I had the same problem as you, i took out the protective circut board and it works like a dream, i put the protective circut board back in and nothing worked. So those circut boards are doing somthing, i just run my lipo without using it...no problems. __________________ Live for nothing, or die for something They can have my rifle when they can pry it from my dead cold fingers

August 11th, 2009, 07:07	#5
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	Would you mind being more precise about the different leads? I don't understand what you mean. Thanks

August 10th, 2009, 18:58	#2
m102404 Tys Trader rating Join Date: Apr 2006 Location: Toronto	Do you have a volt-meter? Measure each cell and see if they're close to each other (IIRC as you measure each end of the balancer tab the voltages are additive). When fully charged, each cell should be 4.2v MAX...and they should be all the same regardless. I did just see one where one of the cells was basically dead...the other two would charge to 4.2 (resulting in a 8.4v pack that just wouldn't work well). We kiboshed that pack right away. Measure it....don't guess.

August 11th, 2009, 17:09	#6
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	It works awesomely without the circuit board! I'm scared of over discharging it though...

August 11th, 2009, 18:48	#8
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	I just don't want to go through batteries like a madman.

August 11th, 2009, 18:54	#9
rustysniper Trader rating Join Date: Apr 2008 Location: Canal Flats BC	from my experience LiPo batteries don't like to be discharged below 9v. Most LiPo chargers have a discharge function...I have discharged batteries to the 9v level and then recharged them and balanced to the 11.1v level and had no problems.....maybe try that....just a thought __________________ Semper Primus: Always First

August 11th, 2009, 19:34	#10
warbird Trader rating Join Date: Oct 2006 Location: NB, Canada	It's working fine now, I just won't use the protection circuit board. Thanks for the info guys!

Lipo Troubles

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