Overview
When critical IoT setups, microcontrollers, or routers suffer unexpected power interruptions, system crashes and data corruption can occur. The 5V UPS 18650 Battery Charging Shield is an advanced uninterruptible power supply expansion board designed to provide seamless backup power. Featuring integrated charging and boosting circuitry, this shield charges your 18650 lithium battery while external power is present and instantly switches to battery backup to deliver a stable 5V output when the main power drops outensuring zero downtime for your electronics.
Key Features
Uninterruptible Power Switching: Automatically transitions between external USB power and 18650 battery backup with zero delay.
Simultaneous Charging & Discharging: Powers your target device while replenishing the battery cells at the same time.
Stable 5V Regulated Output: Delivers clean, consistent 5V power via standard USB ports or header pins.
Built-In Battery Protection: Guards against over-charging, over-discharging, short-circuits, and over-current conditions.
Technical Specifications
| Feature | Specification |
| Product Type | 5V UPS / Battery Charging Shield Module |
| Input Voltage | 5V 9V DC (via Micro-USB or terminal pads) |
| Output Voltage | 5V DC (Regulated) |
| Supported Battery | 1 x or multiple 3.7V 18650 Lithium-ion cells |
| Indicator Lights | LED status indicators for charging (Red) and full/standby (Green) |
Common Applications
Raspberry Pi & ESP32 Projects: Prevent data loss during power cuts by keeping mini-computers and microcontrollers running continuously.
Mini Wi-Fi Routers & Modems: Maintain internet connectivity during unexpected local power load-shedding.
Smart Home IoT Hubs: Reliable backup power foundation for home automation sensors and security controllers.
Note to customers: Ensure your input power supply can handle both the operational load of your device and the charging current of the 18650 cell!
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