The Energizer Pro Battery Charger is a high-quality, mains charger for AA and AAA NiMH batteries. It charges batteries quickly and efficiently, with a full charge sound alert and LED status indicator to let you know when your batteries are fully charged. The charger is also equipped with fault detection, ensuring that your batteries are not overcharged or damaged. This package comes with 4 x AA 2000mAh rechargeable batteries, making it the perfect bundle for anyone who regularly uses batteries. The batteries are high-capacity NiMH and have a voltage of 9V. The charger weighs only 262 grams and is compatible with international plugs. It is suitable for a wide range of applications, depending on the battery charged.