Ballanced?

[leeleefocus]

Originally Posted by Northy

If that happens Lion-O then one half of your saddles is knackered

You are thinking about it the wrong way, you are thinking of filling them from empty like we did with NimH cells etc.

If you had your pair of saddles as above and they were that far out of balance before you put them on charge on a normal balance charger, all it would do is put 2600mah into one saddle and 3200mah into the other - it does it for you without seeing. The end outcome is the same, both are FULLY charged at the end of charge

Bingo. By using the balance charger you are just ignorant to what is going into each individual cell. It only tells you that one of the cells has taken so many ma but you don't know which one and you don't know how far out each cell is.

A balance charger simply bleeds off the excess current from whichever cell or cells reaches 4.2v first until the others catch up.

Bigred ma has got nothing to do with balance it is all about the voltage.

[RogerM]

Northy is spot on.

Carl if your cells do what you say in your example replace them quickly! Mine started getting harder and harder to balance in a similar way (one cell was always much more discharged after a run than the other in teh saddle pair) and it was only a couple more meetings till I lost a run due to a cell going down mid race!

[jkclifford]

thanks for your help guys, seems like both process achieve the same result, as i originally thought. but ,charging them my way allows your to properly monitor what each cell is doing.

[Steven Forster]

Started noticing my Lipos (saddles) were taking longer to charge than normal, only had them since april and then on sunday i noticed that one or both my Lipos when finishing charge were reading less than 8.4v. when checking the cells seperately either 1 or both cells are not showing 4.2v.............should i be worried

LiPo Saddles are IP 5400 / 60C

[damselfly]

Originally Posted by dexter24

Started noticing my Lipos (saddles) were taking longer to charge than normal, only had them since april and then on sunday i noticed that one or both my Lipos when finishing charge were reading less than 8.4v. when checking the cells seperately either 1 or both cells are not showing 4.2v.............should i be worried

LiPo Saddles are IP 5400 / 60C

What's the difference in voltage between the 2 cells upon charge termination?

[Steven Forster]

Originally Posted by damselfly

What's the difference in voltage between the 2 cells upon charge termination?

1st Pack (saddles)

Finished charge at 8.39v i checked them with a cheap muti meter one cell was between 4.19-4.20 and other cell was between 4.20-4.21 both cells kept flicking between the two voltages.

2nd Pack (saddles)

Finished charge at 8.28v, one cell was at 4.20v and other was between 4.08-4.09 which also kept flicking between the two voltages. (I dont think i put this pack on balance charge last night)

I charged both packs up last night, charger is a Core-RC UAC40 Pro AC/DC none of the cells are swollen and have only ever been slighty warm after a race.............