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03-10-2011, 09:02 AM
| #1 |
| Quarry Creeper Join Date: Nov 2009 Location: Tipp City
Posts: 204
|  unbalanced 2s lipo
I've got a 2s 5800mah lipo that is showing 1.18 volts on 1 cell and 5.33 volts on the other. Is there anything I can do to save it?
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03-10-2011, 09:09 AM
| #2 |
| Suck it up!   Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
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Try to balance it. Otherwise, forget it. If you know someone who is pretty familiar with lipo's, they might be able to bring the low cell back up.
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03-10-2011, 09:16 AM
| #3 |
| Quarry Creeper Join Date: Jan 2011 Location: Lyons, MI
Posts: 329
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I dont know 1.1 volts... if you do try and balance it out do it outside away fom anything you dont want to burn down
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03-10-2011, 09:20 AM
| #4 |
| I wanna be Dave Join Date: Oct 2006 Location: Centered
Posts: 2,082
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If your charger has a recovery mode, try that first. 1.18 is pretty damn low, you've lost 2/3 of the cells nominal voltage. Duuuuuuuude's right, if you don't have the facility to attempt a recovery find someone who does...perhaps your local shop, and let them try. Just curious, what brand Lipo is it? |
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03-10-2011, 09:26 AM
| #5 |
| Quarry Creeper Join Date: Dec 2009 Location: jackson,tn
Posts: 402
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that just happened to me 2 days ago on a 2s, it was a blue lipo, cheap but i had it over a year, i just threw it away and ordered a few more of them, just a bigger mah rating.
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03-10-2011, 11:06 AM
| #6 |
| Quarry Creeper Join Date: Nov 2009 Location: Tipp City
Posts: 204
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[QUOTE Just curious, what brand Lipo is it?[/QUOTE] tURNIGY |
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03-10-2011, 11:16 AM
| #7 | |
| I wanna be Dave  Join Date: Dec 2009 Location: San Francisco
Posts: 2,236
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03-10-2011, 12:15 PM
| #8 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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Does your ESC have a LVC? If so, what is it set for (2S, 3S,.....)? | |
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03-10-2011, 12:18 PM
| #9 |
| I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
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Are you certain that the shown voltage is correct and not an error on the part of the charger?
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03-10-2011, 03:02 PM
| #10 | |||
| Quarry Creeper Join Date: Nov 2009 Location: Tipp City
Posts: 204
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Quote:
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Thanks for all the help but looks like I'm out a battery  Going to sit the grandson down tonight and explain the differences in the batteries. | |||
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03-10-2011, 03:29 PM
| #11 | |
| I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
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If it were me, I'd charge that pack for a few seconds on NiMH to bump up the voltage and then switch to Lipo... | |
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03-10-2011, 03:34 PM
| #12 |
| Quarry Creeper Join Date: Jul 2005 Location: pleasant ridge
Posts: 317
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You can charge only the low cell thru the tap on ni setting. Once its up on voltage balance charge it. Outside on concrete. Just in case.
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03-10-2011, 03:35 PM
| #13 | ||
| Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
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Quote:
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03-10-2011, 03:42 PM
| #14 | |
| I wanna be Dave Join Date: Sep 2005 Location: Houston, TX
Posts: 16,952
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03-10-2011, 05:14 PM
| #15 | |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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2-I don't have any grandkids (at least, not proven in a court of law.....  ), but I do have a teenage son (also on this forum). Be nice to your grandson, he can learn a lesson while NOT getting PO'd at you. Remember, it may be tough for some to replace a battery pack (times are tight, RC batteries tend to be near the bottom of the list of "essentials....") but an impression to a younger person tends to be LIFELONG!!Look at the bright side, at least he didn't CHARGE the LiPO at a NiMH setting and burn down your house!  | |
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03-11-2011, 06:43 AM
| #16 | |
| Quarry Creeper Join Date: Nov 2009 Location: Tipp City
Posts: 204
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 I had a nice talk with him last night and he now understands. He's 15 and was like what's the difference, he figured a battery was a battery. So he now is a smarter 15 (kinda like staying at a Holiday Inn Express) | |
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03-11-2011, 10:36 AM
| #17 |
| Rock Stacker Join Date: Jan 2011 Location: hellinois
Posts: 51
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wierd im having a simalar problem,it just happens to be that i have a 3s hobby people 2200mah 20c 11.1v . just started here in the elec. section to do some searching and rite off i seen this post so here i am , my charger is a sigma II eq and reading thru it i founnd it come equipped with a balance setting so i set it up all outside to try will post more if it works. |
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03-11-2011, 11:17 AM
| #18 |
| Pebble Pounder Join Date: Jan 2011 Location: Mtz
Posts: 196
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1.18 volts is low for sure, but what about the 5.33 volts on the other cell, I would be more worried about that. With the low cell u just have to get rid of it, but with overcharged cell, doesn't it have to possibility of it igniting? From what I understand, 4.2 volts per cell was max. If u have anyother way of checking the lipo cells(charger read out or multimeter), I would do that and make sure your volt meter that u are using now is correct. One other thing, how did your battery get charged up so high in the first place? After the battery was run, 5.33 Volts is still higher than my charger would ever take it. Good luck and let us know what u end up doing.
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03-11-2011, 12:07 PM
| #19 | |
| Suck it up! Join Date: Mar 2008 Location: Arkansas
Posts: 11,652
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Charge a battery enough times without balancing and it will go way out of whack. The weaker cell will discharge further when used, and not hold a charge as well when its juiced back up. | |
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Linear Mode
