Automatic Power Switch Module 12V Battery Charger Controller with Smart Charging and Adjustable Voltage

Automatic Power Switch Module Model YX851 Compact DC 12V automatic power switch and battery charger control for small DC systems Key benefits Ensures continuous power to your load by prioritizing the external power supply when it is present. Provides automatic switching to battery power if the external supply fails, keeping devices running without manual intervention. Controls battery charging automatically: charging starts when the battery voltage is low and stops when the battery reaches the set voltage. Simple, user adjustable settings let you set charging start and cutoff voltages. Turning the adjustment clockwise raises the set voltage, turning it counterclockwise lowers it. Built with reliable manufacturing processes for stable performance in everyday applications. Main functions Power priority switching: when AC or external DC power is available, the module routes power to the load and charges the battery. If external power is lost, the module immediately switches to battery supply. Battery charge control: monitors battery voltage and starts charging when undervoltage is detected. Charging stops when overvoltage is reached. Final charge completeness depends on external power voltage, available charging current, and battery capacity. Adjustable thresholds: separate potentiometer adjustments for charging start voltage and charging cutoff voltage. Clockwise increases set values, counterclockwise decreases them. Specifications Condition: Brand Item type: Automatic Power Switch Module Model: YX851 Control voltage: DC 12V Control current: 10A Material: Plastic Color: As picture shown Size (L x W x H): Approx. 69 x 48 x 18 mm (2.7 x 1.9 x 0.7 in) Mounting size: Approx. 61 x 41 mm (2.4 x 1.6 in) What is included 1 x Automatic Power Switch Module YX851 Typical applications CCTV and security camera systems that require uninterrupted DC power and safe charging of backup batteries. LED lighting and small DC loads that need automatic switchover between power source and battery backup. Small off grid or portable systems where automatic charging control and seamless power switching improve reliability. Why choose this module Automatic switching and basic charge control reduce downtime and the need for manual oversight. Compact footprint and standard mounting size make installation straightforward in enclosures and panels. Adjustable settings let you match the module to your battery type and system requirements while keeping operation simple. Installation notes Designed for DC 12V control systems with up to 10A load current. Ensure the external power supply provides appropriate voltage and current to fully charge the connected battery, as final charge depends on supply capability and battery capacity. Adjust charging start and cutoff voltages carefully to match the battery specifications. This module provides a practical, compact solution for maintaining continuous DC power and managing basic battery charging tasks in small electrical systems.