This 4-way battery charger is perfect for keeping your rechargeable batteries topped up and ready for use. It is compatible with both AA and AAA batteries, and has a battery capacity of 4 with a voltage of 1.2V. The chemical composition is high capacity NiMH, which ensures a long-lasting and reliable power source. The charger is a mains charger with a unit type of unit, and has an amp hour rating of 0.22Ah. It is ideal for use with rechargeable batteries, and is a great addition to any battery charger collection. The unit quantity is 1, and it comes with a 4 pack of AA high capacity batteries.