Nope. It doesn't havbe a usb, but you could try to use your laptop's.
DSi console is different from DS lite in size. so some DSi accessory not fit ds lite. such as the DSi case, DSi battery, DSi screen film, touch pen, and so on. but some other DSi accessory can be used in DS lite console. such as r4 card, charger, usb cable, earphone, and so on.
ds lite wont but dsi will
dsi
No, the DSi uses a different charge to the DS lite.
Yes you can trade a DSi for a DS Lite at Gamestop.
There is no such thing as "DSi Lite" but let me tell you this: at the moment of writing, ALL DS games fit in ALL DS's (DS, DS Lite, DSi, DSi XL)
The DS lite and DSi are completely different pieces of hardware. You would have to buy a DSi, you can not turn a DS lite into a DSi
Many people say the screen is a tiny bit bigger on the DSi. The DSi is bulkier than the lite, the lite was designed to be small.
At Gamestop if you trade your DSi for a DSi XL you get $80 off the DSi purchase($189.99). If you trade your DS Lite for a DSi XL
There is no "DSi lite" console but if you mean the DSi XL, it is fully compatible with DSi games(although you'll have to buy them twice if you want a copy on a DSi and a DSi XL)
Definitely the DSi
Yes, the Nintendo DS lite can play DSi games