Title: Worth the $
Product review: If you have a compatible camera that takes this battery, and you plan to use it for more than 300 pictures/charge, then getting a second battery is just as recommended as getting additional memory cards. And, it's worth the few extra bucks to make sure it's a Sony battery in this case, for safety (3rd party batteries are risky, low capacity, and can even explode and ruin your camera), and reliability.
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