Slight battery imbalance - problem?

Mactab · Apr 15, 2015

Just checking my batteries.

After a full charge one of the cells is showing a slight dip in its reading in the pilot app.

Cell 1 is 4.25
2 is 4.33
3 is 4.33
4 is 4.33
5 is 4.33
6 is 4.31

Is this anything to be concerned about?

DCGOO · Apr 15, 2015

How old is the battery? How many charge cycles are on it?

Mactab · Apr 16, 2015

98% battery life. Charged 4 times.

sirnikolas · Apr 16, 2015

Discharge it to 0% then charge it. If this doesn't help, contact the store you bought it from.

Acsmashing · Apr 16, 2015

sirnikolas said:
Discharge it to 0% then charge it. If this doesn't help, contact the store you bought it from.

Yesterday I discharged the battery by having it on while installed on the aircraft. Eventually the aircraft turned off around 2 percent if memory serves right, so I'm assuming it was pretty low on power, but not exactly at 0 percent. How do I discharge the battery to 0%?

The Editor · Apr 16, 2015

Acsmashing said:
Yesterday I discharged the battery by having it on while installed on the aircraft. Eventually the aircraft turned off around 2 percent if memory serves right, so I'm assuming it was pretty low on power, but not exactly at 0 percent. How do I discharge the battery to 0%?

You do not need to - 1 or 2% is fine. 0% on the Inspire equates to around 3.5v per cell and the graphic for each cell will turn red at that voltage.
Allow the pack to recover to ambient temp for 20 mins or so then give it a FULL charge. Battery will then be recalibrated.

DCGOO · Apr 17, 2015

The last TB48 battery I bought behaved similarly. I flew it down to the minimum, 9% when the motors stopped. I left the bird powered for another hour or two, before it completely died. Waited a few more hours, and then a full charge after that, 100% and balanced.

Slight battery imbalance - problem?

Mactab

DCGOO

Mactab

sirnikolas

Acsmashing

The Editor

DCGOO

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