Keep your wireless doorbell camera powered 24/7 with the Wasserstein Universal Solar Charger. Designed for wide compatibility, it supports the Arlo Video Battery Doorbell 2K (2nd Gen), Wyze Duo Cam Doorbell, and eufy E340/C30/C31. NOTE: NOT compatible with wired doorbells. This 2.5W monocrystalline solar panel charger delivers eco-friendly power—eliminating frequent battery swaps and minimizing downtime. Instead of supplying constant power directly, the built-in battery collects and stores solar energy during the day, then intelligently charges your doorbell later—even after sunset. The adjustable triple-panel design maximizes sunlight exposure, while the weather-resistant construction ensures reliable, year-round outdoor performance. With included USB-C connectors and custom backplates, setup is fast, clean, and complete right out of the box.