Product description Key benefits — why you need this product Accurate electrical measurement for troubleshooting and verification: provides precise voltage, current, capacity, and energy readings so you can test batteries, USB power supplies, and DC circuits with confidence. Prevents guesswork and protects devices: by measuring voltage and current in real time, you can detect under‑voltage, overcurrent, and abnormal draw before damage occurs. Simple compatibility with a wide range of equipment: works with any device or power source that falls within the listed voltage and current ranges. Main functions and performance Voltage measurement: 3.6 V to 32.0 V range with 0.01 V resolution and 0.01 V precision — stable, fine-grain readings for low- and mid-voltage DC systems. Current measurement: 0.00 A to 5.10 A range with 0.01 A resolution and 0.01 A precision; supports short bursts up to a maximum test current of 6.5 A for transient checks. Capacity (cumulative): measures 0 to 99,999 mAh with 0.001 Ah resolution — useful for quantifying battery capacity or charge transferred over time. Power (cumulative): measures 0 to 999,999 mWh with 0.001 Wh resolution — tracks energy consumption precisely for efficiency testing and logging. Compatibility and use Works with any DC source or load within 3.6–32.0 V and up to 6.5 A maximum test current. Suitable for USB power banks, small battery packs, solar panels (within voltage range), DC adapters, and electronic test setups. What makes it stand out High-resolution readings across voltage, current, capacity, and energy — enables detailed diagnostics and accurate long-term measurements. Wide cumulative ranges for capacity and energy let you log extended cycles without overflow. Clear numeric precision (0.01 V, 0.01 A, 0.001 Ah, 0.001 Wh) supports repeatable, reliable testing and comparison. Practical applications (scenarios) Evaluating power banks and battery packs: measure real delivered capacity (mAh) and energy (mWh) under load to confirm manufacturer claims or to validate replacement batteries. Testing USB chargers and DC adapters: monitor voltage stability and current supply under different loads to identify weak or failing chargers. Small electronics development and maintenance: verify that prototypes, sensors, and modules draw the expected current and consume the expected energy during operation and sleep modes. Additional notes Use the device within the specified ranges to ensure safe and accurate readings. The listed maximum test current is 6.5 A (for short tests); continuous current measurements are specified up to 5.10 A. Technical summary (as specified) Voltage measuring range: 3.6 V ~ 32.0 V, resolution/precision: 0.01 V Current measuring range: 0.00 A ~ 5.10 A, resolution/precision: 0.01 A, maximum test current: 6.5 A Capacity cumulative range: 0 ~ 99,999 mAh, resolution/precision: 0.001 Ah Power cumulative range: 0 ~ 999,999 mWh, resolution/precision: 0.001 Wh