SAR reader Terence got this mail from Vello:
According to our records, you purchased a Vello BG-S3 Battery Grip for Sony Alpha A7 II, A7S II & A7R II cameras. During the course of routine quality tests by Vello they have become aware of a problem with an internal chip that has the potential to affect your camera’s operation.
Vello is recalling these battery grips – that were purchased on or prior to February 10,2016 – and replacing them with new ones, which include Sony chips that correct the problem.