The GL320MG GPS tracker generally has a battery life of up to three weeks on a single charge. However, the tracking kit comes with a 10,000 mAh battery pack that can extend the device's runtime by a couple more months. A key thing to remember is that this product comes with a solar-powered magnetic case. If you keep the GPS tracker plugged into the battery and the case receives direct sunlight, it'll keep on charging the unit, prolonging its battery life even more.