SPECIFICATIONS

No Coding, No Blackout! DIY UPS Core Kit: Smart Switch (YX850) + Safe Charger (TP4056) to Build 18650 Backup Power for Router CCTV.

Key Features & Benefits:

All-in-One Solution: Contains the two core modules needed to build an Uninterruptible Power Supply (UPS). The YX850 handles automatic switching, and the TP4056 handles safe charging. No need to research compatibility.

Fully Automatic Protection: When main power is on, the YX850 charges the battery via the TP4056. During a power outage, it switches automatically within milliseconds to 18650 battery power, keeping your router, CCTV camera, or IoT device online without data loss.

Type-C Fast Charging & Protection 2-in-1: The TP4056 module supports Type-C & Micro USB input with up to 1A charging current. It integrates charging and full protection (over-charge, over-discharge, over-current, short-circuit) for safe 18650 battery management.

Wide Voltage Compatibility: The YX850 works with 5V-48V devices, compatible with everything from 5V MCUs to 12V routers and 24V CCTV systems. One kit, multiple applications.

DIY Friendly, Plug & Play: Modules have clear labels. Simply connect power, battery, and load. No programming required—perfect for makers, smart home enthusiasts, and security upgrades.

Product Description:

Tired of power outages killing your internet and security? Building a professional Uninterruptible Power Supply (UPS) is easier than you think! This kit combines two of the most reliable modules on the market. The YX850 acts as the "smart brain," monitoring power and switching seamlessly during a cut. The TP4056 acts as the "energy heart," safely and quickly replenishing your backup battery. Together, they form a complete solution for continuous power backup of your critical devices.

🚨 Critical Setup Guide & Warnings

⚠️ 【Voltage Matching is THE Rule】

Your main power adapter voltage, backup battery voltage (e.g., 18650 pack), and load device voltage (e.g., router) MUST BE IDENTICAL! Example: For a 12V router UPS, use a 12V adapter, a 3S 18650 pack (~12V), and set the YX850 accordingly.

✅ 【Correct Connection Steps】

1. Charger Connection: Connect the TP4056's B+/B- to your 18650 battery pack.
2. System Integration: Connect your main power adapter to YX850's VIN. Connect the TP4056's OUT+/OUT- (battery output) to YX850's BAT. Connect your load device (router) to YX850's VOUT.
3. Power Test: With main power on, the TP4056 red LED should indicate charging. Unplug the main power—the YX850 should instantly switch to battery, and your device stays on.

❌ 【Important Notes】

* Switching Moment: The YX850 has a <1s brief power interruption during switching. Ensure your load can tolerate this.
* Charger Requirement: The USB charger powering the TP4056 MUST provide ≥1A output, otherwise it cannot charge properly.
* Battery Activation: A new or deeply discharged battery connected to the TP4056 may have no output. A short connection to a 5V source is needed to activate it.
* Heat Dissipation: Both modules may get warm under high current. Ensure proper ventilation.

What‘s In The Box - For Main SKU

1 x YX850 Automatic Switching Power Module

1 x TP4056 Type-C Lithium Battery Charger & Protection Module