SwitchBot Dual Power Pack - for Lock Pro The SwitchBot Lock Pro Dual Power Pack is an innovative battery kit with improved battery life for your SwitchBot Lock Pro smart door lock. With this battery pack, you no longer have to worry about your smart door lock running out of power. The SwitchBot Lock Pro Dual Power Pack battery is designed for continuous operation for up to 365 days and features a relay charging system that ensures uninterrupted power even when the battery is changed.