## Common ground
All options are devices that transfer electrical energy to charge batteries or power devices.
## Options at a glance
**8504.40 – Static converter type**
- **Defining trait:** Converts electrical energy between AC/DC or different voltage levels using solid-state electronics (no moving parts).
- **Typical examples:** USB chargers, laptop chargers, wireless chargers, travel chargers.
- **Best fit when:** The device is a small, plug-in adapter that changes current type or voltage for consumer electronics.
**Power bank type charging devices containing lithium-ion battery**
- **Defining trait:** A portable, self-contained unit with an integrated rechargeable lithium-ion battery for on-the-go charging.
- **Typical examples:** Portable phone chargers, power banks with multiple outputs.
- **Best fit when:** The device stores energy and can charge other devices without being plugged in.
**Electric car battery chargers**
- **Defining trait:** Designed specifically to charge high-capacity batteries in electric vehicles, often using AC or DC fast charging.
- **Typical examples:** EV home chargers, DC fast chargers at stations.
- **Best fit when:** The device is used for charging large batteries in cars or heavy-duty electric vehicles.
**Charging station**
- **Defining trait:** A fixed infrastructure unit that provides multiple charging ports, often for public or commercial use.
- **Typical examples:** Public EV charging hubs, multi-port charging docks.
- **Best fit when:** The device is installed in a location (like a parking lot) and serves multiple users or vehicles.
## Key differences
| Feature | 8504.40 – Static converter | Power bank type | Electric car charger | Charging station |
|-----------------------|----------------------------|------------------------|------------------------|------------------------|
| Energy storage | No | Yes (built-in battery) | No | No |
| Portability | High | Very high | Low | Very low |
| Primary use case | Small electronics | Mobile devices | Electric vehicles | Public/industrial use |
| Power capacity | Low to medium | Medium | High | Very high |
## How to choose
- Does it store its own energy and charge others without being plugged in? → Power bank type
- Is it used for charging a car or large battery pack? → Electric car charger
- Is it a fixed unit with multiple ports, often in public areas? → Charging station
- Is it a small plug-in adapter that converts AC/DC or voltage? → 8504.40 – Static converter
## Overlaps & pitfalls
- A power bank may contain a static converter (HS Code 8504.40), but its main function is energy storage.
- An EV charger might be part of a charging station, but the station includes infrastructure beyond just the charger.
- If a device fits multiple categories, prioritize based on **main function**: storage (power bank), vehicle-specific use (EV charger), fixed infrastructure (station), or conversion (static converter)