# I Waited 7 Years for a ZERO Battery Smart Lock - Alfred Smart Lock + Wi Charge Source: https://www.youtube.com/watch?v=n42nWBy3lWI Recap page: https://rapidrecap.app/video/n42nWBy3lWI Generated: 2025-07-18T21:01:55.936+00:00 --- ## Quick Overview The Alfred Smart Lock, when paired with the Wi-Charge Wireless Power Kit, offers a truly battery-free experience for the smart lock itself, continuously charging its internal battery via infrared power beaming, though the entire system is quite expensive and the smart lock already boasts a long battery life. **Key Points:** - The Alfred DB2S-KEY-BL smart lock offers five unlock methods: timer, mobile app, pin codes, RFID cards, and traditional keys. - Its connectivity options include Bluetooth, and optional WiFi, Zigbee, or Z-Wave via accessories. - The Wi-Charge Wireless Power Kit, priced between $499 and $799 USD, enables continuous wireless charging of the smart lock's internal battery. - The Wi-Charge system uses a focused infrared beam (100mW or 300mW from 5-10m) and includes human skin detection for safety. - Despite the wireless charging, the smart lock still requires an internal battery or supercapacitor to operate during power interruptions. - Installation of the smart lock and the wireless power kit presented challenges due to non-standard door hole sizes and the need for precise alignment. - The Alfred app allows for remote control, setting temporary or recurring PIN codes, and configuring features like one-touch unlock and auto-relock. ![Screenshot at 1:51: Linus holding the wireless power beaming unit, highlighting its focused beam capability.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-01-51.png) **Context:** Linus Sebastian, a tech enthusiast, has long awaited a truly battery-free smart lock solution. His interest was piqued seven years prior by Wi-Charge's innovative wireless power beaming technology, which demonstrated the ability to wirelessly power devices like phones and even a moving train, while also incorporating safety features like human skin detection. This video explores whether the Alfred Smart Lock, combined with Wi-Charge's latest accessory, finally delivers on the promise of a maintenance-free smart home security solution. ## Detailed Analysis The video reviews the Alfred DB2S-KEY-BL smart home touchscreen deadbolt and its integration with the Wi-Charge Wireless Power Kit, aiming for a "zero battery" smart lock experience. The Alfred lock itself is feature-rich, supporting five different unlock methods including a timer, mobile app, touch-sensitive pin codes, RFID chips, and traditional keys. It also offers flexible connectivity via Bluetooth, with optional WiFi, Zigbee, or Z-Wave through additional modules. The primary focus, however, is the Wi-Charge accessory, which utilizes infrared power beaming to continuously charge the lock's internal battery. This technology, first showcased by Linus Tech Tips seven years ago, delivers 100mW or 300mW from 5-10 meters away and includes a safety feature that cuts power if human skin is detected in the beam. Despite the wireless charging, the lock still requires a small rechargeable lithium-ion battery to ensure operation during power interruptions. The Wi-Charge conversion kit and transmitter are priced between $499 and $799 USD, in addition to the lock's cost. Installation proved challenging due to the need to modify the lock's faceplate and the door's existing holes to accommodate the new components and wiring. The Alfred app provides comprehensive control, allowing users to create recurring or temporary PIN codes, manage RFID cards, and enable features like one-touch unlock and auto-relock. While the wireless charging functionality works, Linus notes the high cost and the fact that the Alfred lock's standard battery already lasts about a year, questioning the practical necessity of such an expensive upgrade for this particular device, though he remains optimistic about the broader potential of Wi-Charge technology for other IoT devices. ### Product Introduction & Features - The Alfred DB2S-KEY-BL smart lock offers 5 unlock methods (timer, mobile app, pin codes, RFID cards, keys) and flexible connectivity (Bluetooth, optional WiFi/Zigbee/Z-Wave). ### Wi-Charge Technology Overview - Wi-Charge uses focused infrared power beaming (100mW or 300mW from 5-10m) with human skin detection, first demonstrated by LTT 7 years ago. ### Wireless Power Kit Components - The kit includes a wireless power beaming unit, a wall wart, and a small rechargeable battery for power interruption backup. ### Installation Process & Challenges - Modifying the Alfred lock's faceplate and the door's existing holes was required, presenting difficulties with cable routing and hole size. ### App Integration & Functionality - The Alfred app allows pairing via Bluetooth, setting master codes, creating user PIN codes (permanent, one-use, time-sensitive), managing RFID cards, and configuring features like one-touch unlock and auto-relock. ### Overall Impressions & Cost - The Wi-Charge conversion kit and transmitter cost $499-$799 USD, adding significant expense to a smart lock that already has a long-lasting battery, making its practical value debatable for this specific application despite the cool technology. ![Screenshot at 0:10: Box of the Alfred smart home touchscreen deadbolt.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-00-10.png) ![Screenshot at 0:20: Text overlay showing 5 different lock/unlock methods.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-00-20.png) ![Screenshot at 0:44: Box for the Wi-Charge Smart Lock Wireless Power Kit.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-00-44.png) ![Screenshot at 0:54: Flashback to an old LTT video showing a train wirelessly powered by Wi-Charge.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-00-54.png) ![Screenshot at 1:44: Close-up of the Wi-Charge wireless power beaming unit.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-01-44.png) ![Screenshot at 2:21: Linus holding the small battery that comes with the Wi-Charge kit, questioning its presence.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-02-21.png) ![Screenshot at 3:08: Linus holding the Alfred lock's internal battery module, showing it also has a battery.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-03-08.png) ![Screenshot at 7:37: Close-up of the old deadbolt being unscrewed from the door.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-07-37.png) ![Screenshot at 8:00: Linus attempting to fit the Alfred lock into the door, showing the cable and the misaligned hole.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-08-00.png) ![Screenshot at 9:33: The Alfred smart lock successfully installed on the door.](https://ss.rapidrecap.app/screens/n42nWBy3lWI/00-09-33.png)