Internal Resistance Is An Important Indicator Of Battery Performance. Under Normal Circumstances, Batteries With Small Internal Resistance Have Strong Discharge Capacity. Support Current Discharge: Batteries With Internal Resistance Have Weak Discharge Capabilities. nternal Resistance Is Like Age. Measuring The Internal Resistance Can Screen Out Good And Bad Batteries And Paired Batteries. When Processing Series-Connected Battery Packs, The Cell Capacity, Internal Resistance And Voltage Need To Be Matched. The Performance Of The Battery Pack Follows The "Barrel Principle", And The Performance Depends On The Worst Battery. Basic accuracy of resistance:0.5% Basic voltage accuracy:0.5% Resistance measurement range:IUQ-200ohm Voltage measurement range:0.-100VDC frequency:AC 1KHZ current:2Mohm/20Mohm gear 50MA; 200Mohm/2ohm gear 5MA; 20ohm/200ohm gear 0.5MA Serial port:It must be opened on the instrument to connect to the computer for communication. It is closed by default. The baud rate is 115200 Resistance range:6 ranges automatic and manual Voltage range:3 ranges automatic and manual Display update:5 times/s Resistance calibration:Each range is manually calibrated independently without affecting each other. Voltage calibration:Each range is manually calibrated independently without affecting each other. Backlight:Yes Display results:LCD screen display, direct reading Energy-saving settings:30-minute delay, automatic shutdown without any operation Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use Type:A:Only Battery Internal Resistance Meter Colour:As Shown Material:ABS Size:about 166x80x28mm Package Contents: 1 *Battery Internal Resistance Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.