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USB POWER BANK // PORTABLE POWER SUPPLY

Former Member

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?

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  • 0

    With a Raspberry Pi 2, nothing plugged in apart from a PI Sense hat I got an uptime of almost 7 hours using a power bank. Pretty impressive and way longer than I expected.

    00:18:16 up  6:53,  0 users,  load average: 0.00, 0.01, 0.05

     

    The power bank specs:

    5v/1000 mA

    2200mAh 8.14WH

     

    I had the LEDs running on the PiSense hat constantly.

     

    If it can last 7 hours with the PiSense on a Pi 2 I would expect much longer on a basic Pi with no connections.

     

    cat sense_test.py 
colour = (95, 95, 0)
background = (0,0, 63)
from datetime import datetime
import time
from sense_hat import SenseHat
import subprocess
sense = SenseHat()
while 1:
     #d = datetime.time(datetime.now()).strftime('%H:%M')
     d = subprocess.Popen("uptime", shell=True, stdout=subprocess.PIPE).stdout.read()
     print(d)
     f = open('uptime.txt','a')
     f.write(d) # python will convert \n to os.linesep
     f.write('\n')
     f.close() # you can omit in most cases as the destructor will call it
     d = subprocess.Popen("sync", shell=True, stdout=subprocess.PIPE).stdout.read()
     sense.show_message(d, 0.1, colour, background)
     time.sleep(60)
Reply
  • 0

    With a Raspberry Pi 2, nothing plugged in apart from a PI Sense hat I got an uptime of almost 7 hours using a power bank. Pretty impressive and way longer than I expected.

    00:18:16 up  6:53,  0 users,  load average: 0.00, 0.01, 0.05

     

    The power bank specs:

    5v/1000 mA

    2200mAh 8.14WH

     

    I had the LEDs running on the PiSense hat constantly.

     

    If it can last 7 hours with the PiSense on a Pi 2 I would expect much longer on a basic Pi with no connections.

     

    cat sense_test.py 
colour = (95, 95, 0)
background = (0,0, 63)
from datetime import datetime
import time
from sense_hat import SenseHat
import subprocess
sense = SenseHat()
while 1:
     #d = datetime.time(datetime.now()).strftime('%H:%M')
     d = subprocess.Popen("uptime", shell=True, stdout=subprocess.PIPE).stdout.read()
     print(d)
     f = open('uptime.txt','a')
     f.write(d) # python will convert \n to os.linesep
     f.write('\n')
     f.close() # you can omit in most cases as the destructor will call it
     d = subprocess.Popen("sync", shell=True, stdout=subprocess.PIPE).stdout.read()
     sense.show_message(d, 0.1, colour, background)
     time.sleep(60)
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