## Common ground
All options describe portable devices used to start vehicles by supplying electrical power to a dead battery.
## Options at a glance
**8504.40 – Battery charger type**
- **Defining trait:** Combines jump-starting with battery charging functionality.
- **Typical examples:** Devices that charge the internal battery while also providing a boost.
- **Best fit when:** User needs both charging and jump-starting in one device.
**8507.10 – Lead-acid (start-type)**
- **Defining trait:** Uses a traditional lead-acid battery designed specifically for engine starting.
- **Typical examples:** Heavy-duty jump starters with large, automotive-grade starter batteries.
- **Best fit when:** High power output needed and durability is key; common in older or industrial models.
**8507.20 – Lead-acid (non-start type)**
- **Defining trait:** Uses a lead-acid battery not intended for engine starting, typically less robust.
- **Typical examples:** Lower-power jump starters using standard lead-acid batteries.
- **Best fit when:** Budget-friendly option with moderate power; not ideal for cold starts or heavy engines.
**8507.60 – Lithium polymer rechargeable**
- **Defining trait:** Uses lightweight, high-energy-density lithium polymer (LiPo) battery.
- **Typical examples:** Compact, portable jump starters for cars and small vehicles.
- **Best fit when:** Portability, fast charging, and lightweight design are priorities.
**8532.22 – Aluminium electrolytic capacitors**
- **Defining trait:** Relies on capacitors (not batteries) to store energy; no chemical reaction.
- **Typical examples:** High-speed, short-duration boosters for quick starts.
- **Best fit when:** Need rapid discharge and long lifespan; not suitable for repeated use without recharging.
**8532.29 – Mobile jump starter with capacitors**
- **Defining trait:** Uses capacitors as the main energy storage, often in a compact box.
- **Typical examples:** Ultra-portable devices for emergency starts.
- **Best fit when:** Lightweight, fast deployment, and long cycle life are essential.
## Key differences
| Option | Energy Storage Type | Weight & Size | Recharge Time | Durability |
|-------|----------------------|---------------|----------------|------------|
| 8504.40 | Battery (with charging) | Medium-heavy | Medium | Medium |
| 8507.10 | Start-type lead-acid | Heavy | Long | High |
| 8507.20 | Non-start lead-acid | Medium | Long | Low-Medium |
| 8507.60 | Lithium polymer | Light | Fast | Medium |
| 8532.22 | Aluminium capacitors | Very light | Fast | Very high |
| 8532.29 | Capacitors (general) | Very light | Fast | Very high |
## How to choose
- Does it use a lead-acid battery designed for starting engines? → 8507.10
- Is it powered by lithium polymer or a rechargeable battery? → 8507.60
- Does it rely on capacitors (not batteries) for power storage? → 8532.22 or 8532.29
- Does it also charge the vehicle’s battery? → 8504.40
## Overlaps & pitfalls
- **8532.22 and 8532.29** both use capacitors; distinction is in design (device type). May overlap if both are capacitor-based.
- **8507.10 vs 8507.20:** Only the battery type differs—“start-type” is critical for classification.
- **No priority rule given**: Choose based on the product’s MAIN function—e.g., if it charges, go with 8504.40; if it uses capacitors, pick 8532.22/29