This is the 22nd in a series of posts on the Sony a9. The series starts here. I set the integration time on the DMM as high as it would go and went in search of the worst-case battery drain conditions. I couldn’t find any mode that cause sustained drains of over an ampere. The… [Read More]

This is the 21st in a series of posts on the Sony a9. The series starts here. I’ve had some questions about how the display mode on the a9 affects the drain on the battery. In the a9, as in the a7x cameras, there are 3 display modes. The default mode is for the camera… [Read More]

This is the 20th in a series of posts on the Sony a9. The series starts here. Let’s take a look at the current draw for a complete power up to power save mode, with the power save timer set to 10 seconds: The vertical scale is about 200 ma/division. At the left, the camera… [Read More]

This is the 19th in a series of posts on the Sony a9. The series starts here. Yesterday, I reported some preliminary dc current drains for the a9 in several modes. Today I’m going to look at current draw as a function of time. When I did similar tests with the a7RII about six months… [Read More]

This is the 18th in a series of posts on the Sony a9. The series starts here. I did a camera heating test for the a9 with what I thought was a fairly heavy usage scenario and reported the results here. The rise over ambient looked like it was going to get to about 17… [Read More]