A voltage source strong enough to move current through a battery, and time. If you need a way to charge your gadgets on the go and you're not particularly fond of also having to charge a battery, let the sun do half of the work for you - Very cheap You need Solar Panel 5 - 10 watt and few time Sunday you can make it - you can buy Solar Panel on ebay and see my do it - Thank for See
Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.