POWERFUL BATTERY. Adds up to 3 months of recharge-free tracking life to your GPS tracking device with this 3-cell?? 3.7V?? 7.8Ah battery pack.</br>WATERPROOF. Magnetic case secures tightly over a gasket that runs the perimeter of the lid and body.</br>SECURE. The enclosure is equipped with an ultra-strong round-base magnet capable of pulling 65 pounds.</br>EASY INSTALLATION. We've eliminated the need for that annoying patch cable - the battery plugs directly into the charging port of the tracker and it all fits neatly inside the case.</br>Exterior Dimensions: 4.9 x 3.5 x 1.6 Inches (Magnet: 0.38 Inches); Interior Dimensions: 4.4 x 2.9 x 1.7 Inches</br></br>Product Description</br></br><b>Add Up to 3 Months* of Power to Your Portable GPS Tracking Device!</b> <p> This powerful external extended GPS tracker battery is a must when you need long durations of recharge-free tracking for your GPS tracker. Just charge your tracker and this battery?? connect the b