There are a lot of reviews talking about how these cables to not work for the Nintendo 3DS. I ordered a pair, and then read those reviews, and began worrying, especially after finding out that this product is somehow not eligible for returns. I cannot find anything that says clearly why, but Amazon (after ordered) denotes it ineligible for return.I find that it did work with my 3DS, under certain circumstances. In my experiences, this will only charge a 3DS to full. Once full, the charging light will begin to blink, and if the system is open/awake, it will not show as connected. It really seems best used when the 3DS is in standby mode to charge. This is fine for me. It is a short cable (3-feet in length) and does not give a long reach to play while plugged in, anyway.I was seeking something to replace the included charger specifically for travel purposes, where I bring a USB brick adapter and prefer to charge items via USB, needing only one base. For that, this will work [for me].