Anyone else had an issue with charging the range extender? I had mine on charge a few days ago and thought it was full. Was flying tonight and the range extender showed 50% from the outset. So I got out my morphie juicer and plugged it in, but the extender wasn't 'fooled' into showing 100%. Flew two batteries to 15% each, the range extender dropped tp 20% and then 10%. Got home, plugged it into the mains using the DJI lead, but it won't accept a charge. I have a P2V and the light on the extender turns red when it's getting juice, but the V+ extender's won't. Just right solid green and left flashing green. Warranty job?