Re: Electronic Engineering Type Question for David Jones
- Thank you for explaining it. I feel that Sony just should have said that the battery last for 70 minutes or so.
--- In firstname.lastname@example.org, 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:
> 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.