Adjustable Settings: This adapter is a brand-new upgrade in terms of functionality and appearance based on the old version. The adjustable settings allow it to be compatible with devices that require 2-4 AA battery charging simultaneously, meeting your diverse device usage needs. No Need for Frequent Battery Replacement: This adapter is used to replace regular batteries and can provide continuous power to your devices 24 hours a day. You no longer need to worry about the battery running out and having to replace it. Convenient to Use: Plug-and-play, saving you time and money. The adapter comes with FCC/CE/ETL certifications, and it is equipped with overvoltage, overcurrent, overcharge, and short-circuit protection, ensuring a safer user experience. Versatile Application: This adapter can work with most device that uses 2-4 AA batteries. Please note that this product is designed to work with low current applications with currents below 1 ampere. Package