I found this in an ad for the Augen Charcoal Eclipse MP4 player:
"To charge the battery, connect the USB cable to your computer's USB port and turn the power switch on the player to "On". The battery icon will appear full when charging is complete."
I plugged in my silver Augen Eclipse, using the short USB cord provided, and a "battery-charging" icon appeared on the screen. Crossing my fingers that I can upload the manual to my PC soon.