Abstract
The need for lighter, compact wireless and portable devices with more ingenious features crammed into an ever-tighter space has led to a related quest for the next power supply innovation—a powerful, long-lasting and compact battery. Current battery technology often satisfies the desired space and weight specifications but compromises on peak power requirements. Batteries are not designed to satisfy the most important requirements of power sources: To provide bursts of power in the seconds range over many hundreds of thousands of cycles. Ultra capacitors, also known as supercapacitors, offer an alternative source that promises to circumvent the battery scramble and extract greater efficiency from existing power sources. They offer boundless growth potential because they respond to key market and societal needs: They are environmentally friendly, help conserve energy, and enhance the performance and portability of consumer devices. Ultracapacitors are also free from characteristic battery problems, such as limited cycle life, cold intolerance and critical charging rates. This makes them a very viable option for practical applications and will create a revolution in long lasting and
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