IB 4200 PROBLEMS PLEASE HELP!!  
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All Forums >> Radios, Batteries, Clubhouse and more >> Batteries & Chargers >> Common Sense RC Support >> IB 4200 PROBLEMS PLEASE HELP!!
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IB 4200 PROBLEMS PLEASE HELP!! - 1/11/2008 10:10:14 PM   
ty2000


 

Posts: 167
Joined: 8/3/2006
From: Temecula, CA, USA
Status: offline 		I have a mached IB4200 pack that has about 15 runs on it my problem is when i try to charge it as of late it cuts of at about 2000mah & the first two cells are hot and the last four are cool i charge this pack @5 amp and discharge to 5.4volts can i bring this pack back to life or should i chuck it
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RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/11/2008 11:46:57 PM   
guver


 

Posts: 8786
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		It sounds like at a miniumum there is severe unbalance and when it is discharged (dead) try doing a c/10 charge for 15 hrs or get someone to test it for you. At the worst your 2 hot cells are weak/bad with others soon to follow. Continuing to charge and use it unbalanced will get worse and worse.

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RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/12/2008 12:09:07 AM   
ty2000


 

Posts: 167
Joined: 8/3/2006
From: Temecula, CA, USA
Status: offline 		if they are unballanced can i discharge each cell to 0.90 and then charge the whole pack?

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       Post #: 3

RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/12/2008 5:49:37 PM   
guver


 

Posts: 8786
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		You could, but if you estimate it is close to discharged already then doing a c/10 charge is the best. Simply cycling, dischargeing and fast chargeing will only make it worse every cycle.

The reason the c/10 charge might "fix" it is because it is relying on the ability of the full cells to dissipate the overcharge while the others catch up. When done they are all full and equalised/balanced.

Your way is second best and should equalise balance the cells (in thier discharged state) make sure to do it very slowly.

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RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/13/2008 1:17:27 AM   
ty2000


 

Posts: 167
Joined: 8/3/2006
From: Temecula, CA, USA
Status: offline 		please explain what a c/10 charge is, i discharged each cell down to 0.90 then recharged the whole pack and i got 4110mah out of it, this pack used to peak at over 4600mah.

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       Post #: 5

RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/13/2008 2:01:33 AM   
guver


 

Posts: 8786
Joined: 3/7/2003
From: LaGrange, OH, USA
Status: offline 		You doubled your capacity from the problem 2000 mah, right? If so, very respectable.

How about those 2 hot cells?

A c/10 charge is (one tenth of capacity) 420 ma for 15 hrs.

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RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/14/2008 2:09:47 AM   
ty2000


 

Posts: 167
Joined: 8/3/2006
From: Temecula, CA, USA
Status: offline 		those two hot cells are not geting hot anymore since i equalized them, i practiced with them today and they still pack a big punch so i guess im ok . im going to buy 3 new packs this week but i don want to buy IB's anymore.. any suggestions, are the new 4600's any good or should i get some older 3700-3800's

(in reply to guver)
       Post #: 7

RE: IB 4200 PROBLEMS PLEASE HELP!! - 1/18/2008 4:44:06 AM   
aviserated


 

Posts: 47
Joined: 1/6/2008
From: OXFORD, GA, USA
Status: offline 		I use the yellow Propels but some swear by the cheaper 4500mah red color Tenergy.

http://www.all-battery.com/index.asp?PageAction=VIEWCATS&Category=17

< Message edited by aviserated -- 1/18/2008 4:46:45 AM >

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       Post #: 8

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