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You charge the rechargeable battery pack itself. The rechargeable battery pack resides in the compartment below where you install the 4 AAA batteries. The rechargable battery pack has a port on the side of it and needs a 5V/2A, USB-C charger to charge. Pretty much any USB-C charger meets that modest criteria. Unfortunately, the battery does not enable "Fast Charge" and takes roughly 8 hours to charge.
Sorry, there was a problem. Please try again later.The eufy FamiLock S3 Max WiFi Replacement Deadbolt with 2K Video Doorbell and Palm Scanner uses 4 AA non-rechargeable batteries, which are included in the package. These batteries should be inserted into the appropriate battery compartment inside the lock's interior assembly to power the device. There's no need to connect a charging cord as the batteries are not rechargeable. If you need more specific guidance, refer to the user manual for details on battery installation.
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