dead

DJI Spark will not turn on. All four lights on the batt are on. No response from Spark. I have started this many times so I am familiar with the two step button press. I know the process. I have searched the forum for a similar problem but most every starting problem seems to be related to...

So I have three Spark batteries. I charged them all before heading to the beach yesterday. But on inserting one of the batteries and pressing the on button it didn't show any power (other two were fine). Got them back home and put them on to charge and one battery showed fully charged within...