The Dunamis AA 1.2v Ni-MH Rechargeable Batteries 2000 mAh come in a pack of 4, making them ideal for powering high drain devices such as sound and vision equipment. These batteries have a voltage of 1.2V and are designed for long-lasting performance. This includes a USB charger allows for easy and convenient recharging, making them a reliable and sustainable power solution for your electronic devices. Made by the brand DUNAMIS in China, these batteries offer quality and efficiency for your everyday needs.