If the battery is powerless when the padlock is off, use the new button battery, insert the emergency socket, and then enter the key password. The high-capacity button battery adopts 2025 batteries commonly used in the market. After testing, one button battery can be switched more than 1000 times, and can be used for more than one year. Made of 98% aviation zinc alloy, robot welding technology and 304 stainless steel lock beam. Supporting for iOS and Android: Mobile phone system, fully supporting over 99% of the mainstream brands in the market to quickly match mobile phones and padlocks. Three steps to open the padlock. Unlock padlock (display blue light), enter the 6 bit key password, immediately unlock if you input correctly. Input error shows red light and you should reinput again. Specifications: Power Supply Mode: 2025 Button Battery (Included) Unlock Mode: Key Password, Intelligent APP Lock Core Level: Chip Lock Body: Zinc Alloy Lock Tongue: Brass Induction Time: