This eGo style USB passthrough plugs into a USB port on your notebook or PC. It has a 2 foot long cord with a mini USB connector and a USB connector for your PC on the other side. They are great for travel.
The battery has a 5 press on/off feature on the switch for safety. In addition to being able to use the battery while it is plugged in, you are also able to unplug the USB cable and use it as a regular 900 mAh battery and take it on the go. This style passthrough has a white LED with a durable hard plastic switch.
Price is for one (1) each of the battery and USB charger cable.