Long Exposures Require More Battery Power

Long Exposures Require More Battery Power
SUMMARY: If you need to take photos requiring long exposures, expect your digital camera batteries to drain quicker.

Here's another common sense tip - if you plan on taking digital photos requiring long exposures of several seconds or more, expect your batteries ( such as casio exilim np-20 battery ) to drain faster, so make sure to bring extra. When might you take longer exposures? Possibilities include:

* Night photos, especially city photos where you're trying to capture the trails of automobile lights* Astronomy photos such as those involving star trails
* Waterfalls
* Fireworks
* Museums or other buildings with low amounts of light

Informations from : http://malektips.com/battery-life-long-exposure.html