I've always wondered as well.
Paul, what is the lowest percentage would you advise when you have to scrap the battery or does the Go app specifically tell you its knackered?
One of my batteries showed 4 green LED lights upon take off, DJI Go also said 100%. Took off about 15', was just about to fly off to the photo subject when the Phantom wanted to land itself almost right away. Had a devil of a time holding it back for a gentle, controlled landing. Just two green LED lights showing upon landing and DJI GO said the battery was just 10%. Conclusion: the battery was no longer holding a charge so I scrapped it. Took it to Best Buy for recycling.
You should never only go by lights or even percentages. I _highly_ recommend displaying the voltage on the Go app and watching that. It's the lowest reading in each cell.
One of my batteries showed 4 green LED lights upon take off, DJI Go also said 100%. Took off about 15', was just about to fly off to the photo subject when the Phantom wanted to land itself almost right away. Had a devil of a time holding it back for a gentle, controlled landing. Just two green LED lights showing upon landing and DJI GO said the battery was just 10%. Conclusion: the battery was no longer holding a charge so I scrapped it. Took it to Best Buy for recycling.
Not really sure
I've been flying for a couple years with those batteries and sometimes the battery cells show red and sometimes they don't
I'm not going to ditch a battery with 4 cycles just yet
May be just a variation or percentage from the other cells when it shows less than the others
I think when the volt of a cell gets to 3.1 then the battery shuts down
Agree 100%- mah put back in on last charge and cell balance are the most reliable indicators of health followed by internal resistance where it might be conveniently measured. I find 70mv imbalance is ok as an upper limit, 15mv would be fantastic.To be honest, I don't know if Go will tell you in time or not. Coming from years of lipo use on helis and planes, I look for overall capacity compared to the stated capacity and, more importantly, balanced cells. I'd want to keep all cells within 0.15V of each other.
So, is there a specific voltage figure which will tell me that the battery is kaput?
I still don't understand. If there is no deviation in voltages, you can keep flying even if your battery health is 10%?