6S is showing up a 5S. Damaged Cell?

[Inch High]

It's prob been discussed before, but I can't find it anywhere.

I am using a FP 4900mAH 22.2V 6S.

I am very careful when it comes to charging and time my flights. (DX7) I had a fly today and timed the flight to 6min. Went home and put it on the charger. BC6, and use the FP V balancer. After dialing up the correct mAH and cell size, I pushed the enter/start button, it did its check and could only find 5 cells.

After reading threads for advice, I thought I better post rather than blow a $400 battery. Not sure how to check individual cell voltages.

Any advice would be great.

[bullaculla]

what is the voltage reading at the main leads?
It might just be a loose pin in the balancer tabs.

[joehelicopter]

It's prob been discussed before, but I can't find it anywhere.

I am using a FP 4900mAH 22.2V 6S.

I am very careful when it comes to charging and time my flights. (DX7) I had a fly today and timed the flight to 6min. Went home and put it on the charger. BC6, and use the FP V balancer. After dialing up the correct mAH and cell size, I pushed the enter/start button, it did its check and could only find 5 cells.

After reading threads for advice, I thought I better post rather than blow a $400 battery. Not sure how to check individual cell voltages.

Any advice would be great.
To read each cell...
you touch the exposed metal on the bottom side of the balancer plug with the Voltmeter probes-read two wires next to each other,then move over one wire...read that pair...each cell should read above 3.2v.......

[Inch High]

Will invest in a Voltmeter tomorrow. So touching the balance plugs on the battery (with the Voltmeter) is safe?

joehelicopter, just so I'm clear, if I touch the 2 most left metal parts on the balance plug, it will read which cell? Do I leave the most left probe and move one probe over, or move both probes? I have never used a Voltmeter before.

Also, even when I connect the battery directly to the charger (Deans), it still reads 5S.

Cheers for the help.

[frebou]

make sure your 2 "probes" are not touching themself while checking voltage via the balancer lead. those pin are awfully close and you could easily touch the two probes.

That would short a cell and cause damage even in a short period.

You can either let one probe on the first pin and see voltage increase gradually while you move through pins or move both probes and see 1 cell at a time.

I your deans connector still sees the pack as being 5S, that no good signs... probably means one cell is dead or whole pack is too low :(