JC Tristar Tester for iPhone/iPad – Charge IC and Serial Number Test Tool

  • Description

The JC Tristar Tester is used to test the charging IC functionality of an iPhone or iPad. Connect the JC U2 tester with your iPhone/iPad, and get the status of the U2 chip and also the serial number of the device being tested. This is a great tool for diagnosing charging issues with iPhones and iPads.


Common Tristar U2 Symptoms

  • Device does not charge and problem is not the charging port
  • Device Charges to to 1% or gets stuck at certain percentage
  • Fake Charging - Shows Lightning Bolt next to the battery icon but device does not charge.
  • Sudden Drop in battery percentage
  • Battery Percentage fluctuates randomly.
  • Device can't charge a drained battery but can charge a partially charged battery
  • Random shutdown, Kernel Panics and Bootloops
  • Device not recognized by Computer or iTunes
  • Accessory Unsupported” error message
  • Device does not work with certain accessories
  • Error 9, 4005, 4013, 4014 when updating or restoring in iTunes




How to use

  1. Connect Lightning cable to the JC Tristar Tester to power on
  2. Click the right function button to select language (language option available only on when you power on JC U2)
  3. Connect iPhone/iPad to JC Tristar Tester via data connecting cable
  4. Optional - Click the left function button to switch between vertical or horizontal display
  5. Check the available data of U2 (Tristar) chip and SN, status showing as NG or OK for each testing result.


  • Real time data read and display.
  • Identifies staus of U2 ((Tristar)) charger IC in split second.
  • Reads and displays Serial number of device being tested.
  • Works on iPhones and iPads with lightning port.
  • 2.4 inch crisp OLED display
  • Precise CNC machining Module made of high quality aluminum raw materials.
  • Optimized algorithm ensure fast and reliable u2 reading.
  • Package includes, JC U2 Tristar tester, and data cable