How to Build or Repair Cellular Phone Chargers

Cell Phone Charger ConversionTake an old cell phone charger e.g. from a Sony/Ericsson phone, check the output voltage against the USB specs, check the pinouts and connect a USB extension cable to the charger. USB to Nokia Safe ChargerThis simple project shows you how to make a USB powered Nokia cell phone charger. The advantage is that it weighs much less than the bulky AC adaptor, and can be used wherever you have a computer or a laptop. Universal USB ChargerMake a USB phone charger for almost any cell phone. Take an Altoids tin, an old wall/car charger that fits your cell phone, a male USB connector, a 220 Ohm resistor (red-red-brown), a LED (color is up to you), a power switch and connect them all together. Car Lighter USB HubMake a portable, multicharging device for your electronics, that will let you recharge your stuff in your car from a cheap USB hub and a car lighter cell phone recharger.