Your Smart Lock receives a true powerhouse with the Nuki Power Pack. Experience up to 100 percent longer battery life compared to conventional batteries. The rechargeable battery pack ensures power supply for up to 6 months without interruption. The free Nuki app displays the current battery level and automatically notifies you when it drops below 20 percent. With the included USB-C cable, the Nuki Power Pack can even be charged while in operation, allowing for a permanent power supply for the Nuki Smart Lock. More power for the Nuki Smart Lock thanks to the rechargeable battery pack. Up to 100 percent longer battery life compared to alkaline batteries. Easy retrofitting possible. Compatible with all Nuki Smart Locks. No battery changes required. Rechargeable via USB-C, even during operation. Accurate overview of the battery level in the Nuki app. Automatic push notifications when the battery level falls below 20 percent.