Quote Originally Posted by David A. Goldfarb View Post
Meters tend to use power when they are actually taking a reading, so they are prone to battery drainage if they are left with the power on and the button used to take a reading is compressed in the case. A flash meter would use more power, I suspect, if you normally use it in the non-corded mode, when it is on and waits for the flash to give the reading. If you plug the meter into the strobe sync, and activate it with the button on the meter, it should use less power.
The recent Sekonics(e.g., 358/558/608/758)have an "auto-off" feature along with an "on/off" button you'd practically have to sit on to activate accidentally.