Feature:1. SWITCHABLE RANGE: Voltage and internal resistance are displayed on the same screen, and the range can be manually and automatically switched2. FOR VARIOUS BATTERIES: The minimum resolution can reach 0.01 milliohms, and the maximum range is 200 ohms, can measure low resistance lithium batteries, acid batteries and high resistance coin cells3. FAST AND STABLE: This tester can be updated 4 times per second, and the range is stable in 1 second. Readings can also be locked. With battery sorting function4. 400MA CURRENT CHARGING: Can be charged by USB with 400ma current. The screen shows the battery voltage, please charge when lower than 3.5v5. WIDE APPLICATIONS: Can measure acid, lithium ion, lithium polymer, lithium iron phosphate, alkaline, dry battery, nickel metal hydride, nickel cadmium, button battery, etc.6. LOW RESISTANCE FUNCTION OF 0.300.50 MILLIOHMS: Short press the power button to turn on the low resistance function and measure the internal resistance of 0.300.50 milliohmsSpecification:Item Type: Lithium Battery Internal Resistance Tester Material: ABSBattery: Built in polymer lithium battery 2000mAhCharging Current: 400maInternal Resistance Measurement(0.01m-200 range, automatic or manual range switching): RangeMinimum ResolutionAccuracy20m0.01m0.7%+7(Turn on low resistance function)200m0.1m0.5%+521m0.5%+52010m0.5%+52000.10.6%+5RangeMinimum ResolutionAccuracyPositive negative 6V0.001V0.1%+5Positive negative 45V0.01V0.1%+5.Package List:1 x Host1 x Probe1 x Test Clip1 x Four Wire FrameNote:1. Within the range of 5%‑95% of the level, when not within this range (less than 5% of the range of the level, or greater than 95% of the level of the gear), the error may be greater than the above accuracy.2. Do not knock to cause irreversible damage.