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J400
User Manual

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Summarization of Contents

Button and Screen Instructions
1. Button Introduction
Introduces the power, LED/light mode, and boost start buttons of the jump starter.
2. Screen Introduction
Details the various LEDs and display areas on the jump starter's screen.
3. Charging Display Instructions
Explains how charging power and battery levels are displayed on the screen.
4. Discharge Display Instructions
Explains how discharge power and battery levels are displayed via USB.
Operation Process Description
1. How to Wake Up the J400
Instructions on how to power on the J400 jump starter.
2.1 Method 1: Normal Start
Details the first method for jump starting a vehicle.
2.1.3 Clamp Connection Status
Describes the clamp connection status display during normal start mode.
2.2 Method 2: Boost Start
Details the second method for jump starting a vehicle with safety reminders.
Jump Clamp Connection Status Display
3. Jump Clamp Connection Status Display
Explains the connection status of clamps based on impedance in different modes.
4. How to Use the Voltmeter Function
Step-by-step guide on using the voltmeter function to check car battery voltage.
LED Lights and Charging
5. How to Use LED Lights
Instructions for operating the LED lights including turning on, changing modes, and turning off.
6. How to Charge the J400
Guide on charging the J400 jump starter using appropriate adapters and cables.
Phone Charging and Error Codes
7. How to Use 5V USB-A Port to Charge Mobile Phone
Instructions for charging a mobile phone using the product's USB-A port.
8. Error Code Display Description
Lists error codes, their explanations, and potential solutions for the jump starter.
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