Is battery life only an issue due to charging times?

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Originally Posted by PCVSNotebook

Maybe another type of capacitors then . I am sure I read about them few years ago.

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Possibly. This whole thread is predicated on the fact that super/ultra capacitors are basically cheap and readily available, and starting to approach energy storage capacity with high density battery technologies. You can by a maxwell boost 3000 farad ultra cap for ~$40 right now.