Any fears that one reads in various forums have not materialized. The Microdrive is not a power-hungry nor particularly sensitive. In my work still like the first day. And when used in a PowerShot G2 standard battery lasts loose two days per 100 images, continuous AF and display a very long time through. I have the battery charged only once every two days, and he never was empty. And at the end of the holiday was still space available on the Microdrive.