How to Use the Astro E4 to Charge Other Devices
1. Plug the USB power cable into a charging port.
2. Attach the remaining end of the USB power
cable to your device.
3. Your device will automatically begin to charge.
4. The LED power meter will automatically turn
off when your device is fully charged and not
drawing a current.
Power Meter Display While Charging Other Devices
LED Power Meter:
LED Display
Battery Capacity
Discharging
Four lights on
100% - 75%
Three lights on
75% - 50%
Two lights on
50% - 25%
One light on
25% - 5%
First light blinking
5% - 0%
5