IEC 60086-5:2016 is available as IEC 60086-5:2016 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 60086-5:2016 specifies tests and requirements for primary batteries with aqueous electrolyte to ensure their safe operation under intended use and reasonably foreseeable misuse. This fourth edition cancels and replaces the third edition published in 2011. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - The definition of explosion was changed to suitable sentence in order to harmonize in IEC 60086 series; - To prevent removal of hydrogen gas, we revised it to the suitable sentence; - To prevent misuse, the battery compartments with parallel connections were revised to the suitable sentence; - To clarify the method to determine the insulation resistance. Keywords: tests and requirements for primary batteries