Energizerreg ecoadvancedreg batteries energizer ecoadvanced is our longest lasting alkaline battery and the first aa battery made with recycled batteries today it contains 4 by total weight which is nearly 10 of a key active ingredient another step in our journey to bring performance and responsibility to the world up to 80 longer lasting energy ideal for your high drain devices made with 4 recycled batteries holds power up to 12 years leakage protection