Tracking power consumption is the most critical step in diagnosing logic board failures, and the Relife XA4 Pro completely revolutionizes this process. No longer do you need to constantly stare at your DC power supply; the built-in screen provides real-time, highly accurate visual curves of power, voltage, and current right at your fingertips to spot the most minute leaks. By meticulously simulating the original Apple battery protocol, this cable guarantees a stable, full system boot without the dreaded auto-restarting or screen flashing (Boot Loop). It is heavily future-proofed with its expandable modular design and PC connectivity for data review and firmware updates.

Technical Specifications & Features:

• Complete iPhone Coverage: Seamlessly supports the entire Apple lineup from iPhone 8G up to the cutting-edge 17 Pro Max series.

• 2-Inch HD Smart Display: A crystal-clear integrated screen that actively plots real-time dynamic curves for voltage, current, and total power output.

• PC Software & Data Playback: Connect to the upper computer software for precise parameter adjustments, data storage, curve playback for complex fault analysis, and continuous firmware upgrades.

• Original Protocol Output: Strictly mimics original battery data, entirely resolving auto-reboot and “unable to boot” logic board issues during bench testing.

• Expandable Dual Interface: Designed with both USB and Type-C ports to actively support high-voltage output and future modular hardware expansions.

• Premium Build Quality: Features thickened pure copper cores inside tangle-free PVC wire, paired with ultra-durable, anti-bending FPC connectors and oxidation-resistant banana plugs.

(Disclaimer): To strictly maximize the utility of the built-in display “Curves”, it is highly recommended to connect the cable to the Upper Computer Software to record the boot sequences of known-good devices. Comparing these stored curves against faulty devices significantly accelerates the precise detection of CPU or NAND failures.