Wide Battery CompatibilityThis alternator tester is compatible with most batteries (1002000 CCA), including Flooded, AGM Flat Plate, AGM Spiral, GEL, and EFB types. Supports multiple testing standards: CCA / SAE / EN / DIN / IEC, ideal for DIY users, home mechanics, and vehicle owners.
Portable Power Bank & Emergency LED LightWith USB-A and USB-C two-way charging ports, it keeps your smartphones, tablets, and more fully powered on the go. The built-in LED flashlight offers 6 modes (100%, 50%, 10%, Blink, SOS, and Strobe), making it a reliable and must-have emergency companion for road trips, camping, and outdoor adventures.
ConnectMax Technology for Faster StartsAutomatically detects the connection impedance between clamps and battery, optimizing power delivery and improving the success rate of vehicle starting, even in challenging conditions.
Packing List & 24/7 Customer ServiceYou will get: JT400 jump starter ×1, Jump clamps x1, User Manual x1, USB-A to USB-C cable x1, Product Storage Bag x1 and 12-month Warranty, If you need any help, please feel free to contact us.
The Best Gift of 2026 designed for urgency. If you're still agonising over what to buy, the JT400 is undoubtedly the best choice for birthdays, Valentine's Day, Father's Day, Mother's Day, wedding anniversaries, Christmas and New Year.
TIPS: To ensure a reliable boost, please ensure that the product has more than 30% battery power. The product has a Bluetooth operating range of about 10 meters.









