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  CNET editors' digital camera buying guide:
What kind of battery is best for my digital camera? What you need to know, from the kind of user you are to current technologies. What kind of battery is best?When it comes to power, the ability to use a variety of battery types can be more important than any single type a camera may use. For instance, lithium-ion rechargeable batteries generally last the longest, but if you're out in the woods, you have no way to recharge them, and you'd probably rather have a backpack full of disposables. Your best bet is a camera that interchangeably supports rechargeables and long-life disposables. Battery types: Model-specific | Universal rechargeable | Disposable  Proprietary batteries come in all shapes and sizes, to best fit a given camera. Model-specificBatteries designed specifically for a particular model or product line.Chemistry: Lithium-ion or nickel-metal hydride (NiMH) Advantages:
• Tend to last the longest. • Make ultracompact designs possible. • Allow for more intelligent battery gauges that more accurately measure remaining capacity. • Better for the environment than disposables. • Less expensive in the long run than disposables. Disadvantages:
• Require electricity to recharge.
• Need to keep charged extras on hand. • Can't use in other cameras or electronic devices. • Don't always have third-party alternatives.  Most rechargeable batteries for cameras are AA-sized. Universal rechargeableRechargeable batteries that adhere to standard conventions and sizes.Chemistry: Nickel-metal hydride (NiMH) Advantages:
• Long-lived. • Better for the environment than disposables. • Can be bought from many sources. • Less expensive in the long run than disposables. Disadvantages:
• Usually require at least two AA-size units to power a camera,
which adds to weight.  Disposable lithium batteries last far longer than their alkaline counterparts. DisposableSingle-use batteries adhere to standard conventions and sizes.Chemistry: Lithium, alkaline, oxy-alkaline Advantages:
• Lithium tend to last the longest and make cameras speedier. • Readily available in stores. • Light. Disadvantages:
• Alkalines don't last long.
• Not good for the environment. More digital camera resources from CNETTop productsBest 5 digital cameras
Editors' top 7-megapixel camerasEditors' top 8-megapixel and higher camerasTop cameras, 10 megapixels and higherTop megazoom camerasTop compact camerasTop ultracompact camerasTop budget camerasTop prosumer digital SLR cameras
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