soli,bro, my explanation not veli clear..
bcos of i set the output voltage (by using DC power supply) at 5.5v and 0.3A,
it will start to charge my phone,if lower than 5.5v, not charging
3.7v is the cell phone battery
juz now i charge the Mi-NH cell,same diode & resistor, then i measure output voltage (6xAA) increase to 7.2v, it can charge my phone.
but, after i plug out the charger cable, then plug in again,not charging, then i measure the voltage is around 6v, so i think if use rechargeable battery to charge cell phone, must maintain the voltage over 7v, it is correct??y like this?