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Re: Electronic Engineering Type Question for David Jones

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  • compumavengal
    Thank you for explaining it. I feel that Sony just should have said that the battery last for 70 minutes or so. Gena
    Message 1 of 3 , Feb 20, 2010
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      Thank you for explaining it. I feel that Sony just should have said that the battery last for 70 minutes or so.

      Gena

      --- In videoblogging@yahoogroups.com, David Jones <david.jones@...> wrote:
      >
      > On Sat, Feb 20, 2010 at 3:00 PM, compumavengal
      > <compumavengal@...> wrote:
      > >
      > > I was looking at the specs for the Sony Bloggie MHS-CM5:
      > >
      > > http://www.sonystyle.com/webapp/wcs/stores/servlet/ProductDisplay?catalogId=10551&storeId=10151&langId=-1&productId=8198552921666073267#specifications
      > >
      > > I don't know how to convert a 3.6 volt into watts to find out how long the battery will last. Under power consumption it states that 1.9W @ 720 30p Recording.
      > >
      > > My experience tells me that the battery time is about 60 to 90 minutes in recording before the battery conks out.
      > >
      > > Can you sling that number hash and tell me how long the battery can function before heading south?
      > >
      > > Thanks,
      > >
      > > Gena
      > > http://createvideonotebook.blogspot.com/
      >
      > You can't tell just from the voltage rating, you need to know the
      > watt-hour rating.
      > According to:
      > http://www.sony.co.uk/product/dcc-batteries---chargers/np-bk1
      > the battery is rated at 3.4Wh, which means ideally it can deliver 3.4W
      > for 1 hour, or any ratio there-of.
      >
      > So if the camera takes 1.9W that's a battery life of 1.8 hours
      > continuous recording (3.4Wh/1.9W).
      >
      > There are other technical factors involved, but that's a fairly good
      > best case approximation.
      >
      > Dave.
      >
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