How often should a battery-operated automatic faucet be replaced with a new battery?

Hydrotek offers three battery life designs for battery powered automatic water taps:

• Normal faucet series: 400,000 on/off cycles, up to 4 years.
• Solar faucet series: 650,000 on/off cycles, up to 6 years.
• Enduratek Faucet Collection: 1,500,000 on/off cycles, up to 10 years.

Hydrotek has designed two kinds of LED flashing expressions to remind customers to replace the old battery in time when the battery power is exhausted.

• After the LED light flashes, the water on/off can be used for about 3 days, waiting for new batteries.
• It cannot be used after the LED light flashes. Batteries will need to be replaced immediately to restore normal operation