USB POWER BANK // PORTABLE POWER SUPPLY

Question

Hi, I got me a raspberry pi 2 model B with UK power standards. Have anyone power this device with a usb power bank that is for charging a smartphone?

Former Member · Answer

Nod* default 5v usb 2.0 that draws from a PC I thought “atleast 700mAh” is not more than that, but it’s a mod discussion right..but still im afraid to do this mod..heh. Great and easy to understand on the PC USB explanation. Thanx Does that mean a power source more than 700mA is safe for the pi2mB? I tested a 2-in-1 desktop charger that charges Li-ion 1320mAh battery for a phone that can be a power bank as well, when the battery is fasten to the charger. The USB port output 5.2V 800mA I tested this on my phone 600 MHz Cortex-A8 which feeds DC 5.0V/1200mA to support my thoughts about pi2mB USB current, I did a cold boot on my phone, but wasn’t enough it only last for less than 20-30 sec then powers down. This could be the charger is not drawing enough current. Will testing this on pi2mB safe? I tested the phone with the 2 usb ports 1)1A 2)2.1A of the power bank and both port testing 1 by 1 charges the phone, and this smartphone has a built in charging script if it is not enough power it will prompt me a message and its built for a usb powerbank right? Does pi2mB have a voltage regulator? Because I saw a vid this person was using an additional board for voltage regulator on his pi1 don’t know if its model B or the default pi1 model, then power it up with a power bank. Will this be the same result as with pi2mB? Meaning without an extra board with regulator I did a mod from a PSU 12v DC to power a small car air compressor that feeds from a cigarette lighter power slot, changed it, so that I can use the house power outlet with a 3 pin plug, without knowing its mAh it worked this was because it’s a really direct current.