Off-grid charging from the power of the sun! This convenient Solar Battery Charger allows you to safely charge your Antigravity Lithium Battery, from a solar panel such as our XS-60 or XS-100. The Solar Charger also works with other brands of solar panels and any 12-Volt Lithium or Lead/Acid vehicle battery. The working temperature is -31 degrees to 113 degrees F (-35degrees C to 45 degrees C), while the storage temperature is -4 degrees F to 176 degrees F (-20 degrees C to 80 degrees C).