We tested 20 wall chargers, from cheap to expensive, to see what we would find – from 15-140W, with screens and without, to arm you with the knowledge to pick a good one out of a sea of mediocrity

Tom’s Hardware tested 20 wall chargers, spanning low-cost options to high-end models, to assess their output, efficiency, and safety features. The results show notable differences that impact consumer choices and device safety.

The testing involved chargers with various technologies, including GaN, USB Power Delivery (USB-PD), PPS, and proprietary protocols like Huawei’s SCP and FCP. Using specialized equipment such as USB testers, wall power meters, and IR thermometers, the team measured voltage, current, wattage, temperature, and protocol adherence.

The results confirmed that higher-priced chargers generally delivered more consistent and higher power outputs, with some budget chargers failing to meet their claimed specifications or overheating during extended use. For example, premium GaN chargers showed better efficiency, less heat generation, and faster charging speeds, while cheaper models often exhibited lower efficiency and higher temperatures.

Specific performance metrics varied: some chargers supported up to 240W, aligning with their claims, whereas others fell short or lacked protocol support, limiting compatibility and speed. Safety features like overcurrent and overvoltage protections were present in most tested chargers, but their effectiveness varied.

Why It Matters

This testing highlights the importance of choosing a charger with proper safety features, efficient technology, and reliable output, especially for high-power devices like laptops. Consumers can avoid potential damage to their devices or safety hazards by understanding these differences. The findings also underscore that higher cost often correlates with better performance and safety, although some mid-range models perform well.

Background

Wall chargers have evolved significantly over recent years, integrating GaN technology and fast-charging protocols to improve speed, size, and heat management. Previously, cheap chargers often lacked safety features or did not deliver their advertised power levels, leading to potential device damage. This test builds on ongoing industry assessments aimed at helping consumers identify reliable chargers amidst a growing market of varied quality and features.

“Higher-end chargers consistently delivered more stable power with less heat, confirming their suitability for demanding devices.”

— Tom’s Hardware testing lead

“Not all chargers that claim high wattage are safe or effective; proper protections are essential for device longevity.”

— Industry safety expert

What Remains Unclear

It is not yet clear how long-term use affects the durability of different chargers, or how real-world conditions like temperature and usage patterns influence performance and safety.

What’s Next

Further testing is planned to evaluate long-term durability and performance under various environmental conditions. Consumers are advised to consider chargers with verified safety standards and protocols, especially for high-power applications.

Key Questions

Are expensive chargers always better?

While higher-priced chargers tend to offer better performance, efficiency, and safety features, some mid-range options also perform well. It’s important to check for certified safety features and protocol support.

Can cheap chargers damage my device?

Potentially, especially if they lack proper protections or deliver inconsistent power. Using certified chargers from reputable brands reduces this risk.

What technologies should I look for in a charger?

Look for support of USB Power Delivery (USB-PD), GaN technology for efficiency, and safety features like overcurrent and overvoltage protection.

Does higher wattage mean faster charging?

Generally, yes, but only if your device supports the higher wattage and the charger is compatible. Compatibility and protocol support are key factors.