Here is the simple solar battery charger circuit designed to charge a 5 - battery using voltage regulator. It is very simple and inexpensive.
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PWM Solar Battery Charger Circuit
Solar Battery Charger Circuit using LM317 Voltage Regulator
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8000mAh Ultrathin Solar Battery Charger Power Bank
8000mAh Ultrathin Solar Battery Charger Power Bank Speccification: Input: 5V 1A Output: 5V 2A Max USB Out: 2 USB In: 1 Micro USB Port Solar panel, Led Light Intergrated | Shop this product here: http://spreesy.com/onlinegeeky/151 | Shop all of our products at http://spreesy.com/onlinegeeky | Pinterest selling powered by Spreesy.com
Here's How To Make A Solar Battery Charger For About $4 So You Can Power Your Stuff Off Grid
DIY Solar Garden Light Hack - Solar Battery Charger - Make a solar battery charger using some dollar store path lights. Using 4 cheap dollar store garden lights you can make a very good solar AA or AAA battery