Real Battery Strangeness

[adanac]

Before there was one, now I have three batteries that say they are dying when, in fact, they have plenty of power left. One starts landing at 70%, another at 60%, another at 40%. What gives? Fixable?

 

[dirkclod]

Charge them up and look at the cells in assistant and see if their off, are they swelling .How old are they ?

 

[adanac]

I'll hook them up and look. No swelling, under 18 months old, not a lot of cycles.

 

[Meta4]

I'll hook them up and look. No swelling, under 18 months old, not a lot of cycles.

But a lot of time just sitting there with a full charge?
Unfortunately this is bad for LiPo batteries and that's why you have a problem.
They need to be stored at around 50% to prevent problems developing.

 

[dirkclod]

Meta is right . Maybe try running them down to about 8% and then recharging them will revive them. Worth a try over chunking em .
Read in here awhile back to do that and did with one of mine but it had a bad cell so no dice .

 

[adanac]

Yes, they have probably been stored at full charge, which I know is bad. I have "normal" lipos for other craft that I keep at a storage charge because I have a charger that can do that. I don't know how to discharge the batteries for the Phantom.

I'll hook them up and look. No swelling, under 18 months old, not a lot of cycles.

But a lot of time just sitting there with a full charge?
Unfortunately this is bad for LiPo batteries and that's why you have a problem.
They need to be stored at around 50% to prevent problems developing.

 

[adanac]

But if I had stored them improperly I'm not sure it would display this behavior. They would run down quicker, right? In my case, the percentage shows 60%-70% but the battery warning flashes and it wants to land. Wouldn't the percentage be lower?