Features: Test and Measure with Precision-: The 18650 battery capacity tester accurately measures the charge and discharge capacity of your batteries, giving you precise results- every time-. Multiple Functions in One: This battery capacity tester offers ranges of features including internal resistance testing, automatic charging and discharging, and cycle testing. Battery Enthusiasts' Must-Have: Designed for those who want to get the most out of their batteries, this tester is perfect for DIY enthusiasts, techies-, and anyone who wants to ensure their devices are powered up for longer. Versatile Usage: Whether you're looking to test batteries for your flashlight, or other electronic devices, this tester is versatile enough to handle all. Easy- to Use and Compact-: With its simple interface- and compact-design, this battery capacity tester is easy to use and can be easily transported- wherever you go-. Perfect for home, office, and on-the-go use. Specifications: Material: plastic Working power supply-: DC5V external power supply- (self provided) Applicable batteries: Suitable for batteries that meet the requirements of stopping discharge voltage- of 2.5V-3.5V and charging at 4.2V Power supply- interface-: dual- TypeC interface- Test quantity: 4-way charge and discharge measurement, channel independent, without mutual influence Internal resistance measurement: supported, using DC- two wire method- to test internal resistance Charging function: the maximum single circuit charge is about 1A-, and it is fully charged- and automatically stops, which is not suitable for lithium iron phosphate battery Discharge function: The maximum discharge of a single circuit is about 1A-, and it automatically stops when the conditions are met- Package Includes: 1x18650 Battery Capacity Tester note: Please allow 1-3cm error due to manual measurement. please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.