there are some reasons, why i chose to use a new battery charge controller

1. I wanted a micro USB port

2. I no longer trust the original one

3. there is place for a new one :)

so i made slots for the charger ( it is a liion-battery-charger/protector) to get it centered over the original usb-connector. you can move it back an forth because at this point you dont know the exact position. google it if you wand, they are about a dollar.