We spent a lot of time and energy trying to find someone at Sony that could tell us the status of the US18650 VTC4 and VTC5 batteries.
The 18650(VTC) type batteries are no longer manufactured by Sony.
The specifications and markings on the battery may vary depending upon the OEM’s requirements. Therefore, it is difficult to determine the true manufacturer or authenticity of the batteries without physical inspection and manufacturing code research.
This type of battery seems to be widely available on the internet market through non-authorized resellers. Therefore, Sony is not liable for the performance or use of this type battery for non-intended purposes. Such applications should be done at the user’s own risk. Furthermore, any battery of this type claimed to be Sony brand may be older stock. We apologize that we cannot offer further assistance with this matter. Sincerely, Sony
OK So Sony is off the table for now -- will keep you up to date , " Vape Girl "