Yet again , dead battery syndrome strikes. I have 5 P4 batts, one , the ne in the drone , seems to hold charge , and charges fine. the other 4 , stored in the boxes they came n , will not charge. On any charger, even the official one . The rub of this is that the whole outfit , is efectively brand-fire new, never having been flown yet, due to having too many drones,not enough time, crap weather , and having aP2V plus as my 'hack' grab 'n' go ship . I have others similarly unflown from new, including an original P2 with 'egg' camera. None of this has any bearing on the P4 dead batteries, tho' . I note there's a fellow in America who does a repair service, fr which there is clearly demand. Is there anyone does similar in the U.K.? I have tried the reset via the contacts on the board on the bottom of one battery , accessed by cutting the appropiate corner of the case to minimise damage. But -no joy! If anyone has any info on this , please let me know. Thanx y'all in anticipation.