Touch₂O^_® Technology kitchen faucets are powered by 6 AA batteries and Touch₂O^® and Touch₂O_.xt are powered by 4 AA batteries. Ordinary batteries will last up to one year with 20 minutes of usage per day. The LED indicator light on the base of the faucet will start blinking red when it is time to change the batteries. If the batteries are not replaced in time, the faucet will still function with manual operation.