This seems a politically motivated press release by the NTSB. Boeing certainly wants to get their planes back in the air. This misleading declaration that NTS

This seems a politically motivated press release by the NTSB. Boeing certainly wants to get their planes back in the air. This misleading declaration that NTSB has identified a "cause" is the first step in removing the grounding order on the aircraft. Chairman Hersman said that potential causes of the initiating short circuit currently being evaluated include battery charging, the design and construction of the battery, and the possibility of defects introduced during the manufacturing process.