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DIY 5v Portable USB Power Supply
Hello! You mean you had buy an USB car charger and that you tried my project? Higher quality 9v cells can be more power full, so it can charger a bit more that a cheap one. But, its sur it can't charge up to 100% the battery on your phone. It can't charger a big tablette, eaven an Ipad mini can't be charge. My project is good to supply 5v with USB. Tank you!
Bought one from Targus ages ago. kind of a disappointment. 9V cells are expensive an at most have 500mAh of juice on them. Typical phone has 1000mAh capacity battery, and the conversion is by no means efficient, so at most you get to charge about 1/4 battery on your phone.
Mini LED POV
Hi ! Yes i know we can buy a connector on ebay, but it was just to show pepole if they can't buy one online. Hope you understand! Tank you.
DIY 5v portable USB power supply
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