Make your own Li-ion power bank

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Introduction There are many ways to make a Li-ion power bank. We will here use 3.7v Li-ion rechargeable battery and few other modules. You can purchase the battery from ebay or Aliexpress or extract from your old laptop battery. This power bank can be used for charging smartphones. What all you need ? Following are the […]

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LED Jar – Weekend Project

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LED JAR This is the simplest LED light. It uses a Nokia BL-5C battery, 3W LED and Li battery charger.   For step by step guide refer the following URL http://www.instructables.com/id/Ultrabright-LED-Emergency-Lamp/