miaomiaooh
New Member
at the lab,i use DC power supply & adjust it to 6v 0.3A, connect to the mobile phone and charge it, use multimeter to measure it and get the result is nearly 0.3A.
But, i use a 6V/1.3AH sealed lead acid battery and place it with a 27ohm resistor,the output current is nearly 0.2A, then charge the phone,it is success to charge but the current is 0.03A, y like this??the current flow to phone using by lead acid battery is difference with using DC power supply.
i juz place a diode connect with phone,it is a very simple circuit.
But, i use a 6V/1.3AH sealed lead acid battery and place it with a 27ohm resistor,the output current is nearly 0.2A, then charge the phone,it is success to charge but the current is 0.03A, y like this??the current flow to phone using by lead acid battery is difference with using DC power supply.
i juz place a diode connect with phone,it is a very simple circuit.