My first impressions - and some info...

Started Jul 28, 2001 | Discussions thread
Jim Popenoe Regular Member • Posts: 241
Re: About batteries...

Wayne,

Any sleuthing your technician can do would help, and many on the forum would be grateful if you let us know what you discover. Battery performance is something I want answers about before I purchase a Dimage 7.

Some D7 owners on the forum say they are doing just fine with NiMH and getting over 100 photos per set. Others are running out of juice in 5 minutes or less. I assume everyone (or most everyone) is being honest. So why the different results?

Some possibilities are 1) different usage patterns, 2) bad batteries and 3) bad cameras. These are TESTABLE hypotheses (but not mutually exclusive). Let's hope owners get busy sleuthing and find their problems. Many people need to be more conservative with the LCD. A few may have bad batteries and/or bad cameras.

NiMH are supposed to maintain a nearly constant voltage, but if they have not been properly conditioned and the current load is high, the voltage may fall below a threshold that the camera cannot accept. I find that my NiMH batteries are functional much longer after conditioning in my Maha C204F charger. A voltmeter can be used during operation to determine voltage output vs. time and camera load, and to discover the threshold voltage at which the camera shuts down.

It may be the the heavy load of the D7 brings down the voltage more than with other cameras, but no one has yet posted data by which to judge this idea. Specifically, we need to know the current demand of the D7 by the LCD, by the EVF, by the flash charger, and by the D7's other electronics before and after power save goes on. Armed with all of this information, owners can better judge the likely cause(s) of the power problems they are posting on the forum, and potential buyers such as me can better decide if the D7 is inherently flawed or just, so far, poorly understood.

Jim

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