2Pcs 4-Channel 18650 Battery Capacity Tester, Automatic Charge Discharge Module with Internal Resistance Test for Flat Top Batteries, Type-C Powered Lithium Battery Analyzer

4 Independent Test Channels: Perform simultaneous charging, discharging, and capacity tests on up to 4 batteries independently without interference. Automatic Operation: Supports fully automatic charging and discharging cycles (1-9 cycles adjustable in auto mode). Charging automatically stops when the battery is full. Internal Resistance Measurement: Utilizes the DC two-wire method to provide reference internal resistance values. For the most accurate reading, measure when the battery is fully charged. Comprehensive Safety Protections: Features overheating protection and automatic power-off saving for your settings. Flexible Discharge Voltage: Choose from 11 stop-discharge voltage levels (2.5V to 3.5V). Dual Type-C Power Input: Includes two Type-C interfaces for flexible power supply options (adapter and cable included).Ideal for Multiple ApplicationsWhether you're sorting used 18650 cells for a DIY power bank, testing AA/AAA batteries for household devices, or maintaining your RC car battery collection, this tester provides the critical data you need. Imagine quickly identifying weak cells in a batch, ensuring only the best performers go into your projects.Important Usage Notes: After installing a battery, wait a few seconds for the voltage and internal resistance readings to stabilize. Discharge current is fixed at a maximum of ~1A (non-adjustable, non-constant current). Charging voltage is fixed at 4.2V. Not compatible with LiFePO4 batteries. Internal resistance readings may appear high at low voltages; reinstall the battery for a more accurate measurement. Package Includes: 2 x 18650 lithium battery capacity tester

• Professional 4-Channel Tester: Simultaneously measure internal resistance and capacity of 4 batteries independently for fast, accurate health assessment
• Smart Automatic Protection: Features auto charge cutoff and discharge stop to prevent overcharging/over-discharging, ensuring battery safety and longevity
• Optimize Battery Performance: Automatically performs up to 9 charge-discharge cycles to revitalize and maximize battery capacity
• Compact & Universal Design: Supports flat-top 18650 batteries (2.5V-3.5V discharge, 4.2V charge) for easy, convenient testing
• Dual Type-C & Safety Features: Powered by DC5V (cable not included) with high-temperature protection and active cooling for reliable operation