Duty and Freight Add 10.0% to Batteries and Storage Cells From South Korea

South Korea shipped $3.9 billion of batteries and storage cells to U.S. buyers in 2025. USITC reported an effective calculated-duty rate of 7.9%, while measured freight added 2.1% of customs value — an additive 10.0% burden before domestic logistics. No country-specific unit value is available for this lane, so it is not ranked by landed unit cost.

• reported duty rate: 7.9%
• freight share: 2.1%
• total uplift: 10.0%

The alternatives, same arithmetic: Mexico at 2.1% uplift, Canada at 3.7% uplift, Hungary at 9.5% uplift. At least one listed lane has a lower duty-and-freight burden; total-cost ranking still requires comparable country-specific unit values.

The effective calculated-duty rate is USITC's reported calculated duty divided by the customs value covered by those duty observations for 2025; it is not a verified cash-payment amount or proof of any particular exclusion, quota, or trade-program claim. Freight is the lane's reported import-charges share of customs value. Reference data, not a customs quote.