The Third Wave Power mPower Pack 50 Battery has 5000 mAh battery capacity which charges a smartphone 3 to 4 times. Compact, light and ultra portable. Comes with built-in flashlight. Works on its own or docks into mPowerpad 2 solar charger (available separately). Fast, versatile 3-way charging from wall, USB or sun. 5.0 x 2.8 x 0.5 inches. 0.3 pounds.