A lightweight rechargeable battery (4.0Ah). This water-resistant battery pack comes in a multi-attachment Velcro soft case that can be attached to the neck plate or belt. The battery meets IPX5 standard: Water resistant; withstands heavy rain and water from any direction. The LED battery indicator ensures that you can keep track of how much power that remains in the battery. The battery is easily charged via a micro USB cable and has a charging time of 3 hours.