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Thank you for purchasing the Justice 4000mAh Slim Power Bank, item JUSPB01.  Your device can act as a universal, portable and rechargeable power source.  It can be 

used to charge most smartphones and USB devices. Please read this manual carefully FIRST in order to get the most out of your power bank.

USER’S MANUAL

ITEM JUSPB01

A Quick Look 

Charging Your Power Bank

Charging Smartphones

LED Indicator

Lights

USB Charging Port

Power Button

Micro USB Charging Port

Your power bank comes pre-charged and ready to use right out of the 

package.  However, once its internal battery is drained, you will need to 

charge it in order to continue using it. Follow the steps below in order to 

charge your power bank.

1. The included 

Micro USB 

charging cable has 

a Micro USB plug 

and a USB-A plug.

2. Press and hold the Power 

Button to power on your 

power bank.  Insert the USB 

charging cable’s Micro USB 

plug into the Micro USB 

charging port on your power 

bank.

3. Insert the USB charging 

cable’s USB-A plug into the 

USB port of a computer or 

suitable USB charging 

adapter.

4. The LED Indicator Light 

turns blue and flashes 

while the power bank is 

charging.  The light will 

remain blue and stop 

flashing when charging is 

complete. Unplug when 

charging is complete. 

Micro USB

Plug

USB-A

Plug

Charging

 

(Blue Flashing)

Fully Charged

 (

Blue)

Important: The power bank's internal battery will become depleted over 

time if left idle. Periodically charge your power bank if it is left unused for 

extended periods.

Notes:  For best results, make sure to plug into a USB port or USB charging 

adapter with an output of 5V/800mA or higher.

You can use your power bank to charge smartphones or other USB 

devices. The internal battery of your power bank must be charged in 

order to do this. If it is not, please review the previous steps regarding 

charging your power bank. Follow the steps below in order to use your 

device to charge a smartphone.

1.  Press and hold the Power Button to power on your power bank.

2. Insert one end of the smartphone’s charging cable (not included) into 

the USB Charging Port on your power bank. Plug the other end into the 

charging port on your smartphone.  Once plugged in, your power bank 

will begin charging your smartphone.

3. The LED indicator light will turn blue when your smartphone is 

receiving a charge from your power bank. The LED indicator light will 

turn off when your power bank’s battery is drained completely. You can 

see the charging status on your phone’s display screen. Unplug once 

your phone is fully charged.

NOTE: Do not charge the power bank and charge your phone or USB 

device at the same time.  This will shorten the power bank’s battery life.

(blue)

 = Power bank is charging a USB device

(off)

 = Power bank’s battery is completely drained

SLIM POWER BANK

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