Key benefits discharge efficiency: as the lithium battery series voltage increases, discharge efficiency approaches 100 percent, providing more effective power delivery. Seamless, uninterrupted UPS: a constant current charging circuit with zero switching time enables seamless switching and uninterrupted operation without a separate charger for lithium batteries. Unattended operation: designed for yearround use, once wired, it requires no manual intervention and automatically manages charging and discharging. Clear charging status: builtin charging status display offers simple, intuitive monitoring of charging and battery state. Load stability and reliability: fixed power distribution and constant current charging keep the load operating stably, regardless of battery charging, and the charging process is not affected by dynamic changes in load. What it is and how it works Unified voltage framework: input voltage equals working voltage equals battery charging voltage equals full battery voltage, eliminating voltage mismatches between the lithium battery and the load. Zero voltage difference goal: the system is designed to fill the zerovoltage gap between the working voltage and the lithium battery full voltage. Power balance and safety: adapter power is set to the sum of battery charging power and load power, ensuring a stable, safe, and efficient circuit. Efficiency example: efficiency is achievable, for example with an 11.1 V configuration, efficiency calculated as (11.1 V – 0.3 V) / 11.1 V × 100% ≈ 97.3%. Compatibility and performance Designed for lithium battery systems with fixed power distribution and constant current charging to support stable operation of connected loads. The system manages charging and discharging automatically and is not affected by dynamic load changes. The approach ensures tight coordination between charging and usage, enabling reliable performance without user intervention. Use scenarios Home or office environments requiring reliable backup power for critical devices such as routers, modems, computers, and NAS units. Remote or unattended installations (telemetry, security cameras, sensors) where manual UPS management is impractical. Smallscale energy systems or solar backup setups that benefit from automatic charging and uninterrupted load operation. Notes The described configuration emphasizes efficiency, reliability, and ease of use by aligning input, working, charging, and fullvoltage levels, while maintaining constant current charging and automatic management of charging/discharging.