How does battery capacity affect electric screwdriver cost?

Battery capacity affects electric screwdriver cost because a larger battery usually requires more cell material, a larger battery pack, different charging design, and sometimes a larger handle or housing.

The main effects are:

Higher capacity: increases battery cost

Longer runtime: adds value for professional or frequent-use products

Larger size: may require more internal space and a bigger handle

Higher weight: can affect balance and comfort

Longer charging time: unless the charging current and PCB are also upgraded

Higher shipping cost: larger batteries can slightly increase product and freight weight

Different compliance requirements: battery specifications must remain consistent with UN38.3 and other shipping documentation

A practical range for precision electric screwdrivers is usually:

200–300 mAh: compact and lower cost

300–500 mAh: good balance between runtime, size, weight, and price

500 mAh or more: longer runtime, but normally with higher cost and larger product size

For precision screwdrivers, the largest battery is not always the best choice. A well-designed 400 mAh battery can provide a better user experience than a larger battery that makes the tool heavy or unbalanced.

ToolQeen precision electric screwdrivers typically use a 3.7 V / 400 mAh battery, which provides a practical balance between compact size, charging time, runtime, and cost.

For OEM projects, ToolQeen can evaluate the battery capacity, motor, PCB, charging current, runtime, handle size, and target price together before selecting the final battery configuration.