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D800, 70-200 f/2.8 VRII and Battery Level Issues

phil711

Williams, US
144 posts

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phil711 Silver Member Nikonian since 08th Jun 2008
Sun 22-Sep-13 07:03 PM

Thom Hogan’s D800 guide suggests, among other things, that batteries:
1. not be stored for extended periods either fully charged or fully discharged
2. occasionally be fully discharged and then fully charged (“conditioned”)
3. not necessarily be topped off between uses

I have followed these guidelines fairly well for years and had no battery problems, but I may have a problem now. Granted, that in the great universe of problems, this is not a biggie.

Several weeks ago after a shoot, I noticed shots with my D800E and 70-200 f/2.8 VRII lens were not as sharp as usual. The 24-70 f/2.8 worked well. A friend suggested the battery may have been low causing the lens to not focus as well or as quickly as usual. I checked the “Battery Info” menu and it showed 70%. With a fully charged battery the lens again functioned as well as ever.

I am curious if anyone has noticed focusing issues with partially discharged batteries -- especially with the D800 and 70-200 f/2.8.

Superstitious as I am, I have now been topping off the batteries before going out to shoot rather than letting the batteries run down before switching them. I do not want to ruin the batteries by only using them in the fully charged state -- for all of the reasons explained by Mr. Hogan. I plan to occasionally “condition” them as he suggests.

Would someone please suggest a convenient method of discharging the batteries from time to time. I have been considering putting a bunch of images on an old CF card and running the D800’s slide show a few times in the evening during leisure time. Any other suggestions?

Thanks for you thoughts on this subject.

Phil

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