I plugged the OEM cord into my iPhone charger, which I plugged into a wall electrical outlet. (I never charge anything by plugging into a PC/laptop, because charging via wall outlet seems more efficient to me given the variability of laptops and PCs.)
The red light stays on until it's fully charged, at which point the light goes off entirely. That's how both my DW17 and DW21 work.
I used the instruction sheet without trouble, so didn't need additional directions. Maybe you can Xerox and increase its size under magnification settings on a copier. If you don't have access to a copier, you could go to a FedEx/Kinko's and they'll do it for you cheap.