APU 4000LX Portable Charger

Congratulations on your purchase of the APU 4000LX Power Bank & Flashlight from US Digital Media! To ensure a long service life and optimum functionality of the product, we recommend that you read these instructions carefully.

Package Contents

  • 1 Power Bank
  • 1 USB charging cable
  • 1 user manual


  • Capacity: 4000mAh
  • Input: 5.0v / 1A
  • Output: 5.0v / 1A
  • Charge Time: about 5 hours
  • Charge and Discharge: ≥500 times

Compatible with smartphones, iPhones, iPads, iPods, MP3 players, and other electronic devices.


To charge the power bank:
It is recommended that the power bank be fully charged before first use. When power bank is off, insert the micro USB plug into the appropriate port on the power bank. Insert the standard USB plug into any USB port with a power source. During charging, the four indicators will light one by one. When all 4 lights are lit, charging is complete. Disconnect the charging cable from the power bank and the power source.

To charge devices from the power bank:

  • Press the Power button. The 4 capacity indicators show how much capacity remains.
  • 4 Indicators: 75% to 100%
  • 3 Indicators: 50% to 75%
  • 2 Indicators: 25% to 50%
  • 1 Indicator: up to 25%

To turn on the LED flashlight, press and hold the power button. To turn the flashlight off, press and hold the power button again. When the last indicator begins to blink, it means the power bank's capacity is lower than 25%, and the power bank will need to be recharged.

Safety Information

Warning: failure to follow these safety instructions could result in fire, electric shock, injury, damage, or others. Do not drop, disassemble, or modify this product. Do not expose this product to fire or excessive heat. Do not expose this product to water or excessive humidity. Only use the USB input cable provided with the product to recharge the battery.


4000LX diagram