5VUPSBOARD Uninterrupted Power Supply Module DC 5V 1A UPS with 18650 Lithium Battery Protection Board What it is A compact UPS module designed to provide a stable 5V 1A output and seamless switching to a Liion/Lipolymer battery (18650 cells supported) when input power is unavailable or out of spec. Key benefits Reliable 5V supply: delivers up to 5V at 1A (max) to keep your 5V devices running during minor power dips or outages. Safe automatic transfer: if input voltage is present but exceeds the safe range, the unit automatically cuts input power (at 6V) and switches to battery power mode to maintain continuity. Protection against miswiring and surges: input terminal features reverse connection protection and input overvoltage protection. Battery protection builtin: supports Lipolymer or 18650 lithium cells with protective circuitry to guard against common fault conditions. Battery status at a glance: battery capacity is indicated by the flashing frequency; faster flashes indicate higher capacity, and the unit autoshuts down when the battery is low or not charged. Clear safety guidance: the board heats during charging; mount away from the battery. Polarity must be correct for safe operation. Specifications Model: 5VUPSBOARD Uninterrupted Power Supply Module Output: 5V 1A (max) Input: greater than 5V at 1A Battery options: Lipolymer battery, 18650 lithium battery (recommended capacity less than 10000mA) Input terminal protections: reverse connection protection; input overvoltage protection; automatic cutoff of input power when input exceeds 6V and switch to battery power mode Battery terminal protections: reverse connection protection; short circuit protection; reverse connection will not be damaged when charging External input limit: input voltage above 20V may cause protection unit fault Output terminal: suitable for ordinary loads; do not connect to other power adapters; reverse polarity will cause damage Notes on operation and safety Battery capacity display: the flashing frequency indicates charge level; faster blink = higher capacity; device autoshuts down when battery is low or not charged Mounting caution: the board heats during charging; keep the board away from the battery when mounting Polarity: ensure correct battery polarity to avoid damage Use scenarios Scenario 1: Desktop electronics prototyping and small projects requiring a stable 5V supply during power fluctuations or outages (for example, ESP32, Arduino, sensors, and small embedded systems). Scenario 2: Portable 5V power backup for field testing or remote IoT deployments where a reliable 5V source is needed and a battery can provide continuity when mains power is unavailable. Scenario 3: Small test bench for validating 5V peripherals and USB devices, allowing safe protection against reverse wiring and overvoltage while testing batterybacked operation.