Mobile without battery

[kluivert]

mobile without battery

Could i power the mobile phone without battery , only using 5Vdc supply ?
if it's possible how i connect to the mobile power pins, i know that there are 3 pins 2 of them 0 and 3.3V from battery but the 3rd ???

 

[pisoiu]

mobile-phone+powering without-battery

With 5V you will probably burn it. The maximum voltage of a standard li-ion cell is 4.2V.

/pisoiu

 

[Johansen]

power mobile without battery

I would not be surprised if it worked, my ipod runs fine off 4 AAs for a nominal 6.2 volts max.

you might want to increase the voltage slowly through a 200K resistor, but i doubt the buck/boost converter uses anything less than 20 volt mosfets.

 

[pisoiu]

Not all designs connect the power input to a converter. Some of them will power the GSM RF amplifier directly from the li-ion cell, and that one will definitely not withstand up to 20V. It's you cell phone after all, try and see, but don't blame others of smoke comes out.

/pisoiu

 

[sohail_akram]

Use step down regulator
converter LM2576T-ADJ for 5 to 3.6v