Relife XA4 Pro One-Touch Power On Cable for iPhone 8 to 17 Pro Max

Testing a bare or separated iPhone board means powering it up again and again, and without a power button attached that usually involves tweezers on a test point. The Relife XA4 Pro adds one-touch power-on for boards from the iPhone 8 to the iPhone 17 Pro Max.

The XA4 Pro is a one-touch power-on cable from Relife for iPhone motherboard testing. The listing describes it for bare and separated boards and chip-level troubleshooting, but doesn't detail the connectors, cable length or how many are included.

When the XA4 Pro is useful

• A board that won't power on and needs repeated boot tests.

• Separated sandwich boards under diagnosis.

• Boot failures where you need to watch current at power-on.

• Fault finding after a short or liquid damage.

Setup tips from the listing

Confirm the model before connecting, seat the cable on the correct connector or test points, and never force it into an incompatible socket. Disconnect power before changing connections, and use ESD protection throughout.

Secure the board on the bench so it can't shift while powered; a moving board is the easiest way to short an exposed contact. The listing notes that functions may vary by XA4 Pro version, so check the photos for the version you'll receive.