Joybuy Insights

How to choose a charger without making the wrong purchase: find the right model for every situation

Choosing a new charger seems straightforward, until you realise that not every phone charger supports the same charging standard. An adapter may advertise a high wattage, but without the right cable or compatible technology, your device will not charge any faster. Wireless chargers and battery chargers also have clear limitations that often only become apparent after purchase.

So pay particular attention to these common pitfalls:

  • Confusing the maximum wattage with the actual charging speed. A 100 W charger will not automatically deliver 100 W to every connected device.
  • Overlooking compatibility. A MagSafe charger, Qi2 charger or Samsung charger will not work in the same way with every device.
  • Paying too little attention to the conditions of use. An indoor USB-C charger is not designed for damp environments or use in a car. A car battery charger requires different connections and safety features.

Which specifications are important?

1. Charging power and charging protocol

Power is expressed in watts. For smartphones, 20 to 25 W is often sufficient, while tablets and laptops may require more power. A laptop charger with multiple ports must also divide its total power output when you connect several devices at the same time.

As well as the wattage, check which technologies are supported:

  • USB Power Delivery (PD) for many modern USB-C devices.
  • PPS for certain Samsung devices with Super Fast Charging.
  • Qi2 for wireless charging with magnetic alignment and up to 15 W, depending on the device.
  • MagSafe for compatible Apple devices. Magnetic attachment does not automatically mean that every phone will charge at maximum speed.

According to the product description, the Samsung 25W Efficiency Adapter supports USB-C and up to 25 W. The Samsung 45W models state that they support Power Delivery and PPS. The suitable charging speed still depends on the connected device and the cable being used.

2. Number of ports and power distribution

Whether you work from home or travel regularly, you will often need several connections. A multi-charger with two USB-C ports and two USB-A ports can be more practical than four separate adapters. However, check how the total power is distributed.

The Anker 543 PowerPort Atom III states a total output of 65 W, distributed across one USB-C port with up to 45 W, one USB-C port with up to 20 W and two USB-A ports. This makes the GaN charger suitable for charging, for example, a smartphone, tablet and laptop at the same time, provided the total power consumption remains within the specifications.

A GaN charger uses gallium nitride instead of traditional silicon in its switching technology. According to the product description, this enables a slim design. On its own, this says nothing about its lifespan or performance in every real-world situation; check the technical specifications, warranty and user manual for that information.

3. Device type, battery and environment

A phone charger, battery charger and car battery charger are not interchangeable.

  • For smartphones and tablets, you will usually choose a USB-C charger or wireless charger.
  • For an iPhone 12 or newer, a MagSafe charger may be relevant. A Qi2 charger is an alternative for compatible Qi2 devices.
  • For an Apple Watch and AirPods, a 3-in-1 charging station can save space.
  • For power tool batteries, stick to the correct product family, such as Einhell Power X-Change or POWERPLUS Dual Power.
  • For vehicle batteries, check the voltage, battery type and capacity in Ah. A 12V battery charger for lead-acid batteries is not automatically suitable for every lithium battery.

Pay attention to the environment too. Products intended for indoor use should be kept dry. Connect a car battery charger according to the instructions and check the polarity. A CE marking and stated protection against issues such as overheating or short circuits are useful points to check, but always use the product according to the manual.

Our recommendations by user profile

Suitable for: Budget-conscious beginners
Samsung 25W Efficiency Adapter with USB-C cable

Samsung 25W Efficiency Adapter - Includes 1 Metre USB-C Cable - White

Why it suits this profile: A straightforward choice for anyone looking for one compact adapter with a cable for a USB-C smartphone.

How this product avoids the pitfall

The maximum power output and included cable are clearly stated. However, check that your device supports 25 W and the correct charging technology.

Key benefit & advantages

25 W output, one USB-C port and a 1-metre cable.

Suitable for: Buyers seeking premium quality
Belkin Qi2 3-in-1 Magnetic Wireless Charging Stand

Belkin QI2 3-in-1 Magnetic Wireless Charging Stand, Black

Why it suits this profile: Ideal for a dedicated desk or bedside table where an iPhone, Apple Watch and AirPods can be charged together.

How this product avoids the pitfall

Compatibility is specifically described for MagSafe-compatible iPhones, Apple Watch and AirPods with a wireless charging case.

Key benefit & advantages

Qi2 up to 15 W, three charging positions, foldable design and an included USB-C cable.

Suitable for: Specific applications & intensive users
Einhell Power X-Change car battery charger 12V 3A

Einhell Power X-Change Car Charger - 12V, 3A

Why it suits this profile: Convenient for users of Einhell Power X-Change tools who want to charge batteries on the move in a car or caravan.

How this product avoids the pitfall

The charger is designed for Power X-Change lithium-ion batteries and not for batteries from other brands. This makes the compatibility limits clear.

Key benefit & advantages

12V connection, 3A charging current, seven-stage LED status indicator and car battery protection according to the product description.

Suitable for: Home workers and travellers
Anker 543 PowerPort Atom III 65W GaN charger

Anker 543 Powerport Atom III Universal Black Fast Charging Indoor

Why it suits this profile: A practical solution for a desk, hotel room or hand luggage with several USB devices.

How this product avoids the pitfall

The port layout and total power output are specified. This allows you to assess in advance which devices can be connected at the same time.

Key benefit & advantages

Two USB-C and two USB-A ports, 65 W total and a slim design with GaN technology according to the product information.

Looking for more options?

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

Frequently asked questions about chargers

Which charger do I need for a smartphone?

First, check your phone’s connection and charging protocol. For modern devices, a USB-C charger with Power Delivery is often suitable. Samsung users should look for PPS and the required wattage. For iPhones with magnetic alignment, a MagSafe charger or compatible Qi2 charger may be suitable options.

Is a charger with a higher wattage always faster?

No. Your phone, tablet or laptop determines how much power it draws. An adapter rated at 45 W can therefore charge a device that requires less power without any problem, but it will not automatically charge it faster than the device supports. Also use a cable that is suitable for the required power.

How long does a charger last?

Its lifespan depends on heat, cable strain, moisture, frequency of use and storage. Keep chargers dry, avoid sharp bends in cables and do not use an adapter with a damaged casing or cable. For a battery charger or car battery charger, it is also important to use only the specified battery type and voltage.