Some of the world’s largest airlines are banning bulk shipments of rechargeable batteries in the face of mounting evidence of their potential to cause catastrophic in-flight fires.

Citing safety concerns, United Airlines on Monday became the second major U.S. airline to announce it will no longer accept bulk shipments of rechargeable batteries, also called lithium-ion batteries, which are used to power everything from smartphones to laptops to power tools.

Delta Air Lines quietly stopped accepting bulk shipments of the rechargeable batteries on Feb. 1. The airline said in a statement that it took the action in response to government testing and concerns raised by its pilots and flight attendants. <> 

Update (October 2015): More details on the battery hypothesis for MH370…this new article gets a little lost toward the end when it tries to jam the plausible battery hypothesis in with the ridiculous Indian Ocean official narrative…I leave that to you to piece together–you can read the comprehensive report I made at the time (Cracking the Code on MH370) as well as the latest on the battery hypothesis. I concluded back in March 2014 that the plane went down upon exploding over the South China Sea shortly after takeoff – the battery theory fits perfectly with that.