Your Whistle GPS Tracker was designed with battery life in mind! You should get up to 7 days from a single charge and the following information can assist you in extending your tracker's battery life.
The Whistle GPS has a feature called Power Saving Mode. When your pet's tracker is close to the base station, the tracker "hears" the short-range radio signal that is being emitted and automatically switches to power saving mode, reducing the load on the battery. Keep in mind that although the range of the radio signal is approximately 150 feet, that signal can be affected by walls and large metal objects such as appliances. Locating your base station in a central location close by where your pet spends most of their time will help keep your tracker running as long as possible.
Click here for more information on charging your Whistle GPS tracker.