Joybuy Insights

Choosing a car charger: how to find a safe, suitable charger for the road

A flat smartphone battery on a long car journey is frustrating, but choosing the wrong car charger can also waste your money. A high wattage on the packaging doesn’t automatically mean your phone will charge faster. Ports, cables and your car’s power supply can all limit performance.

Pay particular attention to these three common pitfalls:

  • Looking only at the maximum wattage: a 100W charger won’t necessarily deliver that much power to every port or device.
  • Overlooking compatibility: a USB-C port doesn’t automatically mean every fast-charging protocol is supported.
  • Forgetting your vehicle’s voltage: check whether the charger is suitable for a 12V or 24V socket.

Read on to find out which specifications matter and which models are suited to different needs.

Which specifications should you check when choosing a car charger?

1. Input voltage: 12V or 24V

Most cars have a 12V socket. Lorries, motorhomes and some commercial vehicles use 24V. So a 12V car charger won’t necessarily be suitable for every vehicle.

Models with a DC 12–24V input offer greater flexibility. Examples include various PAVAREAL and Baseus models in the range. Even so, check your vehicle’s manual and the product specifications before ordering.

2. Power and charging protocols

Power is measured in watts. For a smartphone, 20W to 30W is often enough for a quick charge, while a tablet or laptop may need more power. A PD fast car charger uses USB Power Delivery via USB-C. Check whether your device supports this protocol.

It’s worth distinguishing between:

  • Total power: the maximum output across all ports combined.
  • Power per port: the maximum power a single connected device can receive.
  • Power distribution: when several devices are connected, the available power may be shared between them.

A USB-A charger can be a good choice for older cables and accessories. For recent iPhones, Samsung phones and laptops, a USB-C car charger with PD is often more practical. Check the cable, too: one with a low power rating can limit charging speed.

3. Number of ports and connection type

A multi-port car charger is handy for families or commuters who want to charge a phone, sat nav and tablet at the same time. Check whether you need USB-A, USB-C or a built-in cable.

A built-in or retractable cable saves space, but make sure it’s compatible with your device. According to Oxerbog’s product information, the included Type-C cable is designed for iPhone 15, 16 and 17 series and Android devices; it isn’t suitable for iPhone 14 or older models.

Safe and practical use

Choose a model with a secure fit and use the charger according to the instructions provided. Bear the following points in mind:

  • Don’t use the charger in a damp environment.
  • Don’t use damaged cables or casings.
  • Check that your vehicle’s fuse rating is suitable for a high-power model.
  • Don’t leave a charger plugged in for extended periods if your vehicle manufacturer advises against it.
  • The casing may become warm during high-power charging, but stop using the charger if you notice a burning smell, melting or visible damage.

A CE or RoHS marking can provide useful information about documentation and compliance, but it doesn’t replace checking the product specifications and instructions for use.

Our recommendations for different users

Suitable for: Budget-conscious beginners
Anker Car Charger 30W 2 Ports

Anker Car Charger (30W, 2 Ports)

Why it suits this user: With two USB ports and a total output of 30W, it’s a straightforward choice for everyday use with a smartphone and a second USB device.

How this product avoids the pitfall

The product information clearly states the total output and number of ports. This makes it less likely that you’ll expect a high individual output that isn’t available.

Key benefits and features

30W total output, two USB ports and a compact casing. The product description says it has built-in protection against overcharging, overheating and short circuits.

Suitable for: Shoppers looking for premium quality
Baseus PrimeTrip VP2 Car Charger 45W

Baseus PrimeTrip VP2 Car Charger 45W

Why it suits this user: A good fit if you’re looking for a USB-C car charger for a smartphone, tablet or compatible laptop, and value having a cable included.

How this product avoids the pitfall

The USB-C output is rated up to 45W, and the product information states that the input supports DC 12–24V. Check that your laptop supports USB-C charging.

Key benefits and features

USB-C output up to 45W, suitable for 12V and 24V sockets, and supplied with a 1-metre USB-C to USB-C cable.

Suitable for: Specific needs and heavy users
ATSHARK K006S 160W Car Charger

ATSHARK K006S 160W Car Charger

Why it suits this user: A practical option for travellers or families who use several devices at once and appreciate built-in retractable cables.

How this product avoids the pitfall

The product information specifically notes that the actual output may be limited by your vehicle’s fuse. Check your vehicle’s manual before using it at high power.

Key benefits and features

According to the product information, it has two USB-C ports, one USB-A port, two retractable cables and supports 12V/24V input.

Looking for more options?

We’ve put together a complete, up-to-date list of products that meet these strict selection criteria and the applicable European safety requirements.

Frequently asked questions about car chargers

Is a USB-C car charger suitable for iPhone and Samsung phones?

It depends on the port, cable and charging standard. A USB-C car charger with USB Power Delivery may be suitable for many recent iPhones and Samsung phones, but always check the product specifications for both the charger and your cable.

Can I charge a laptop with a car charger?

Yes, if your laptop supports USB-C Power Delivery and the charger provides enough power. Check your laptop’s required wattage. A 20W charger is generally intended for smaller devices; some laptops need a higher output.

Does a car charger use power when nothing is connected?

A plugged-in adapter may use a small amount of power, depending on the model and the car. Unplug the charger if your vehicle will be parked for an extended period, especially if the instructions recommend doing so.