Batteries dead?

[usaken]

I did a bad thing. I stored my smart batteries fully charged for 6 months. They showed 4 green lights when I put them in the vision but only flew for 3 minutes or less then landed with the low battery alarm. I have put one of them back on charge and it shows 3 greens so far. Should i charge and discharge them several times? I hope i did not ruin them. Any advice is appreciated.

 

[msinger]

If they are puffy, you should dispose of them. If not, then try depleting them completely by running them in your Phantom or via a compatible battery discharger. And, then recharge them. That process will re-balance the battery cells. If you experience the same issue after they have been re-balanced, then you should replace them.

 

[Fplvert]

Hi Ken,
You might try recharging them and running them down to 8%, then recharge fully. Discharge the battery while flying close in, then finish with no props to 8%. I would also check the battery life (press and hold the power button on the smart battery).

In my experience, I don't trust a battery with less than 90% battery life. No long distance or over water because you might have an unplanned landing.

 

[Bryce]

Unless you changed the battery settings, wouldn't they discharge down to 50% or so automatically after 10 days or whatever the default is?

 

[msinger]

It depends which firmware is installed on the batteries. Not all versions of the P2 firmware include that feature.

 

[Bryce]

It depends which firmware is installed on the batteries. Not all versions of the P2 firmware include that feature.

He has a P2? I missed that.

 

[msinger]

He has a P2? I missed that.

Yep. As he stated above, he has a "vision".