Battery life for mirrorless cameras is dismal, especially when comparing with DSLR cameras. My Canon 7DMkII does easily 1200 exposures on one battery charge and I have had times with 2000+ exposures. My X-Pro2 with the Optical Viewfinder and no image display after taking the image gives me:
- The original Fujifilm battery: NP-W126S: 290 exposures
- The no-name brand battery: NP-W126: 180 exposures
BTW, these are my numbers, from my experience.
So turning off the camera or reducing the number of functions is a good way of extending the life of the batteries. Fujifilm has the standby mode which is a combination of the auto-power and of the power management.
This setting is about how long it will take the camera before it goes to sleep after no activity. The shorter the time, the longer the battery life The longer the time, the shorter the battery life * OFF. The camera is not supposed to go to sleep. The keyword here is: supposed. Sometimes the camera will turn itself off, even with the OFF setting. My experience has been that’s when the battery has been toward the end of its power.
- High performance: Fast AF and very high quality LCD/EVF display for both the image taking and the review.
- Standard: Fast AF and high quality LCD/EVF display for both the image taking and the review.
- Economy: Slower AF and much lower quality LCD/EVF display for both the image taking and the review.
When the camera is in standby mode, it has to monitor if the user presses the shutter button.
I have noticed that my Fujifilm cameras: X-M1, X-T10 and X-PRO2, take more time to wake up from the standby mode than turning the camera on.
So I take my photos, turn off the main switch around the shutter and turn it back on when I want to take photos. It takes me about 1 second to turn the camera on and by the time I lift the camera to my eye/viewfinder the camera is ready.