AT&T Cingular 3125 Smartphone "charger voltage limit" Questions

...you can use a series resisitor of about 47 ohms with a 6-9 VDC. If the battery takes up voltage the see if the charger will respond and the set will

charger will not work, or you can apply a +5 VDC voltage to the power terminal, marked + and - on the battery case, on the two outside terminals I believe. This 5VDC must be current limited for safety

...charger. Other AC chargers will not work for this purpose and neither will a USB port. You can JUMP START the battery using a USB port by cutting off a USB cable to expost the red and black power USB ...