This is the 23rd in a series of posts on the Sony a9. The series starts here. In this post, I tested a fairly severe a9 use case and found: A rise over ambient looked like it was going to get to about 17 or 18 degrees C above ambient. A time constant of about… [Read More]
Archives for June 2017
Worst-case Sony a9 battery draw
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]
Sony a9 battery drain vs display mode
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]
More on Sony a9 battery draw
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]
Sony a9 dynamic battery draw
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]