How is electric screwdriver battery performance tested?
Electric screwdriver battery performance is tested by checking capacity, runtime, charging behavior, voltage stability, temperature, cycle life, and performance under load.
We recommend testing:
Battery capacity: verify the actual mAh or Ah against the rated specification
Voltage: check nominal voltage, full-charge voltage, and discharge cut-off voltage
Runtime: measure how long the screwdriver operates under a defined working load
Charging time: confirm the battery reaches full charge within the specified time
Charging current: verify the charging circuit works within the designed range
Voltage drop under load: check whether battery voltage falls excessively when the screwdriver is working
Torque stability: confirm torque output remains stable as battery level decreases
Speed stability: check whether RPM changes significantly during discharge
Temperature rise: monitor the battery during charging and repeated operation
Protection functions: verify overcharge, over-discharge, over-current, and short-circuit protection where applicable
Self-discharge: check how much capacity is lost during storage
Cycle life: repeatedly charge and discharge the battery to measure capacity retention over time
Battery consistency: compare voltage, capacity, and runtime between production units
Post-aging performance: repeat runtime, torque, and charging tests after endurance testing
For a meaningful battery test, buyers should define the working load, torque level, speed, test duration, charging method, ambient temperature, and minimum acceptable runtime or capacity retention.
For ToolQeen precision electric screwdrivers, a typical battery specification is 3.7 V / 400 mAh, with approximately 70 minutes charging time and around 120 minutes runtime, depending on operating conditions.
For OEM and ODM projects, ToolQeen can evaluate battery capacity, runtime, charging performance, protection circuit, cycle life, temperature rise, and compatibility with the motor and PCB before mass production.