We have all wood floors with two german shedders. This vacuum picks up the dog hair with easy. Great on all of our rugs. The first few months the battery could handle one floor of our house on 2000 sqft first floor on one charge. Now the battery needs to be charged 3 times and today the battery lasted 3 minutes before having to switch to low power to clean less than 100 sqft. Love the vacuum but where can I find the correct battery?