After months of investigation Samsung has determined that battery faults are to blame for the Galaxy Note 7’s propensity to catch fire.

Many folks speculated that the battery was likely the root cause of the fires but we now know the exact reason the handset was such a fire hazard.

The South Korean manufacturer determined that there was a fault in the original Note 7 stock as well as a separate and unrelated fault in the batteries used in replacement Note 7 handsets.

In the original handset it was found that the space the battery occupied was too small and caused a short circuit.

In the replacement Note 7 it was determined that punctures in the battery layer separating the positive and negative tabs could be punctured and cause the handset to ignite.

Additionally, some replacement batteries were found to be missing an insulation layer separating the positive and negative poles.

The firm apologised to customers, retailers and mobile operators among others for the problems with the handset and that said this incident will not happen again.

“Today, more than ever, we are committed to earning the trust of our customers through innovation that redefines what is possible in safety, and as a gateway to unlimited possibilities and incredible new experiences,” president of Samsung’s mobile communications business DJ Koh said.