The 9v batteries are very often used in electronics, example: programmable circuits, robots and etc... But they have a very huge problem, theirs capacity is low and the rechargeable 9v batteries needs at least 9.5v to charge them up. I thought much time about this project because would be an importa...By: Imetomi
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from Instructables: exploring - technology - robots http://ift.tt/1E32D4Y
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