The "Go Pack" for the RH5R provides additional charging through the USB port on the back of the battery. Simply connect the included cable to the battery and the other end to your USB charger for charging on the go! It's the perfect compliment to your RH-5R as a spare, backup, or race events where battery life is critical. The BAT-RH5R-USB battery can also be charged in your RH5R cradle providing another charging source! Learn more about the RH-5R Radio. Go Pack Includes • USB chargeable 1800mAh battery • USB charging cable Compatible with Rugged Radios RH5R.