Battery drain with D800?

Started Aug 17, 2012 | Discussions thread
MOD TOF guy Forum Pro • Posts: 13,995
Re: Battery drain with D800?

The camera is indeed designed so that the battery runs a few diagnostic functions while it's "off" (it's not entirely off obviously). That's per design and nothing to worry about. The drain on the battery is very small.
It may seems that the camera is "off" when you remove the battery but it ain't so ! The camera has an internal secondary battery which it uses to run some key functions (in particular maintaining power to part of its memory and run the inside clock) when the main battery is removed. This internal battery get reloaded when you insert a battery in the camera. Do not insert a battery for a while and the internal battery will ultimately get depleted. No biggie: the clock will need to be reset to the right date and time, and your settings restored. Still there is no point in doing that. As you can see even if you remove the main battery the camera is still going on with a few tasks while you were sleeping eating etc. Yet it never bothered you, simply because you were not aware of it. So leave the battery inside the camera and don't loose any appetite or sleep over it

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