AA/AAA Battery Voltage Internal Resistance Tester 0~999mΩ  Indicate Volt Tester Checker 18650 Lithium Battery Tester Backlight        Features:  1: Multiple compatibility and wide application  2: Simple operation is clear at a glance, one key single turn on/off backlight/sleep  3: Smart detection prompt  4: ABS flame-retardant environmental protection material, high temperature resistance  5: One-handed control anytime, anywhere, light weight/small size/built-in lithium battery/carrying belt    Description:  Set a variety of powerful functions and one body  Professional precision LCD display Industrial-grade appearance Simple operation Backlight function Long energy storage  HTN wide viewing angle LCD, green backlight  Large capacity and easy to charge  3.7V/1000mAh spare lithium battery Type-C charging port  Multiple compatibility and wide application  Measuring 18650 lithium battery  AA/AAA alkaline battery voltage and internal resistance  And through the LCD liquid crystal screen display  ABS flame retardant material  Size: 156*63*36mm    Package Included:  1*digital display tester  1*User manual