by excluding source found that the Samsung, apparently, is the only producer of smartphones, which in battery testing smartphone sales to start relying solely on its own laboratory.
To begin with, we note that it is not just about testing to detect problems, and testing and to obtain the relevant certificate, allow selling smartphones in the US.
The fact is that to obtain these documents the manufacturer must give their product to test one of the 28 laboratories that are certified association Cellular Telephone Industries Association (CTIA), where it is checked for compliance with the institute standard Institute of Electrical and Electronics Engineers.
Many manufacturers rely solely on this test. There are exceptions. For example, Motorola (exactly specified at the source) says that tests the batteries in their own labs, but still then gives them to the CTIA tests in the laboratory to obtain the certificate.
As for the Samsung, it relies entirely on its own laboratory, as they have the right to issue the relevant certificates. Perhaps now the process of change, as Samsung after problems with Note7 promised to radically revise its processes to ensure product quality, but did not specify exactly what is meant.