Hi, My charger from HTC Tattoo broke. Then I thought of turning one of my old nokia chargers int a mini usb charger. My Original power supply: -Output: 5V --- 1A My nokia charger: -Output: 5V --- 880mA I cut the cable from nokia charger and also cut the mini usb cable, then I connected the 5v wire from nokia to the red wire from miniUsb and GND from nokia to black wire from miniUsb. When I plug the mobile phone nothing happens. What am I doing wrong?