Well, the story goes like this: I was trawling through Poundland, and I saw this I thought to myself "Hmm, this looks like a cheap alternative to the PowerChimp+, so all I need is a USB>3DS Connector and this could charge my 3DS!" It runs off 4x AAA batteries. Warning: Spoilers inside! So, I bought it and decided to take it apart to see what it did. Warning: Spoilers inside! It's basically feeding the 4x AAA batteries directly into the connector port, which feeds it through the cable into the USB device of your choice. There is a little black cylindrical shape (possibly a resistor) on one of the wires, which reads either 140 or 1400 (fainted print) M. Close up below. Warning: Spoilers inside! So that leads on to my question- is it safe to buy this USB to DSi Cable, plug it into the USB port of this portable battery pack, and charge my 3DS on-the-go with it?