As an old SLR camera, the D70s does not have the USB fast charge function. If you need to install USB fast charge, you need to buy a special battery box adapter or external fast charge device, and install and use according to the instructions. However, it should be noted that the architecture of the camera hardware is not designed for fast charging, fast charging may affect battery life and even damage the camera hardware, so we must carefully understand the product safety performance and use methods before use, so as not to cause unnecessary losses.