Controlled Battery Endurance Test

Protocol Objective

This test closely simulates the real-world use of a camera.  Specifically it provides for the  idle-on power consumption occurring between actual picture taking and the reasonable use of the monitor, important for post-exposure evaluation.  A conservative approach to determining published specifications has been taken by means of de-rating of test results.  The purchaser can thus expect the battery to meet or exceed the rated service life.


Camera Settings

ISO: 80 / Auto Bracket: Off / Flash Compensation: 0 / Sharpness: Normal / Contrast: Normal / Record Mode: SHQ, 2240 x 1680, 1:2.7 / Interval Timer: Off / Shutter Sound: Type 1, High / Warning Sound: On / Rec View: 5 Sec / Sleep: Off / White Balance: Auto / Focus: Auto / Flash: Fill-in / Shooting Mode: Manual / Metering Mode: Spot / Memory Card: Compact Flash 256 MB / Other Options: Not used or Not Applicable

Test Procedure

Ambient Temperature: 70 Degrees F. / Camera on Tripod / Target: 18% Gray Card at 10 Feet / Focusing Aid: Thin Vertical White Line on Target / Exposure Setting: 1/100 @ f/4 / E-10 Camera Battery: 4 x AA alkaline, Eastman Kodak / Battery: 8 x D alkaline, RayOVac / Camera Switched On for Duration of Test / One Full-Range Zoom Out & In per Exposure / Flash Output 50%* / One Exposure per Minute

Every 45 exposures E-10 camera switched off, battery switched off, E-10 camera switched on for on-board battery check, battery switched on for auto self-test.  Every 90 exposures CF card reformatted.  Exhaustion point of D battery determined by LED blinking during camera cycling; exhaustion point of E-10 AA battery was E-10 control panel battery icon blinking.

The test was repeated, using an E-10 camera battery (4 x AA Ni-MH, RayOVac).  The end point of the D battery was established at a two second LED illumination delay upon battery turn-on (self-test).  The camera battery pack was replaced as needed to reach the end point.


E-10 AA Alkaline pack: 540 exposures to first detectable LED blinking / 765 exposures to battery icon blinking on control panel / 810 exposures to auto camera shutdown

E-10 AA Ni-MH pack: 1140 exposures to exhaustion as indicated by failure to pass automatic load test on turn-on



*How does one set the E-10 for 50% flash output for this endurance test?  Set up the camera in a darkened room on a tripod about 10 feet from an 18% gray card.  Set the camera for manual operation and spot metering.  Zoom in on the target so the spot circle resides in the field of gray. Flip open the built-in flash, set mode to fill-in, and select zero compensation. Set the shutter to 1/100 s. and start with the lens wide open.  Take a photo of the gray card and then look at the histogram.  Note the peak and the distribution. At this point, the flash is operating at some undetermined fraction of full power.  Take a  series of photos, stopping down the lens one f/stop with each exposure.  Observe the histogram and make a note of when the pattern begins to move to the left on the monitor screen.  At the point when the first movement occurs, the flash is working at 100%.  To set the flash for 50%, just open the lens by one f/stop.