The Charging Speed Wars: 240W GaN Chargers Tested

GaN (Gallium Nitride) chargers have reshaped the charging landscape. These compact powerhouses replace bulky laptop chargers with devices barely larger than a phone charger. The latest generation pushes into 200-240W territory — enough to charge gaming laptops. We tested seven models to separate marketing claims from reality.

What Is GaN and Why Does It Matter?

Traditional chargers use silicon transistors. GaN transistors switch faster with less energy loss, producing less heat. Less heat means less need for large heat sinks and cooling space, which means smaller, lighter chargers.

The practical result: a 65W GaN charger ($35) is the size of a standard 30W phone charger. A 100W GaN charger fits in your palm. A 240W GaN charger is half the size of the traditional 240W laptop charger it replaces.

What We Tested

We tested seven GaN chargers from 100W to 240W on consistent loads, measuring:

• Actual wattage delivered (vs. advertised)
• Multi-port power distribution
• Temperature under sustained load
• Size and weight

Test Results Summary

| Charger | Claimed | Actual (Single Port) | Actual (Multi-Port Total) | Temperature | |---------|---------|---------------------|--------------------------|-------------| | Anker 735 65W | 65W | 64.2W | 60.8W | Warm | | Anker Prime 100W | 100W | 98.7W | 94.3W | Warm | | Ugreen Nexode 100W | 100W | 97.1W | 91.8W | Warm-Hot | | Anker Prime 200W | 200W | 196.4W | 188.7W | Hot | | Ugreen Nexode 200W | 200W | 194.8W | 182.1W | Hot | | Baseus 240W | 240W | 234.2W | 220.5W | Very Hot | | Anker Prime 240W | 240W | 237.1W | 228.3W | Hot |

Key Findings

Single-port delivery: All tested chargers delivered within 3% of their advertised wattage on a single port. Marketing claims are accurate for single-device use.

Multi-port reality: When multiple ports are in use, total delivered wattage drops 5-15% from the single-port maximum. A 100W charger delivering 94W across three ports is completely normal and expected — power management circuitry consumes some overhead.

Heat management: Chargers above 100W get noticeably hot under sustained load. The 200-240W models reached 55-65°C surface temperatures (too hot to hold comfortably). This is within safe operating range but means you shouldn't bury them under papers or in an enclosed space.

Our Top Picks

Best All-Around: Anker 735 65W ($35)

The Anker 735 GaNPrime 65W is the charger we recommend most. It charges any laptop up to MacBook Pro 14", any phone, any tablet, and most accessories. Three ports (2 USB-C + 1 USB-A), foldable prongs, and it weighs 4.2 ounces. For 90% of people, this is the only charger you need.

Best for Power Users: Anker Prime 100W ($59)

The Anker Prime 100W handles MacBook Pro 16" (96W max) and any phone simultaneously. Two USB-C ports + one USB-A, compact design, and intelligent power distribution. If you have a power-hungry laptop, this is the minimum.

Best for Gaming Laptops: Anker Prime 240W ($119)

The only charger you need if you have a gaming laptop that charges via USB-C. Delivers genuine 140W on the primary port (EPR — Extended Power Range) and 100W + 40W on secondary ports. Replaces your laptop's massive charging brick with something half the size.

Best Budget: Ugreen Nexode 65W ($27)

If the Anker 735 is out of stock or you want to save $8, the Ugreen Nexode 65W delivers comparable performance at a lower price. Slightly larger form factor, but the three-port layout and power delivery are nearly identical.

How Multi-Port Power Distribution Works

When you plug one device into a multi-port charger, it gets the full rated wattage. Plug in a second device, and the charger redistributes power between them. Here's how a typical 100W charger distributes power:

| Port 1 | Port 2 | Port 3 | |--------|--------|--------| | 100W | — | — | | 65W | 30W | — | | 65W | 20W | 15W | | 45W | 30W | 25W |

The charger's primary port (usually labeled or positioned as port 1) gets priority. Secondary ports receive whatever power remains. Your laptop always gets priority over your phone.

GaN vs. Silicon: The Size Comparison

| Wattage | Silicon Charger Size | GaN Charger Size | Size Reduction | |---------|---------------------|-------------------|----------------| | 30W | Pack of cards | Dice | 60% smaller | | 65W | Small brick | Pack of cards | 55% smaller | | 100W | Medium brick | Small brick | 50% smaller | | 240W | Large brick | Medium brick | 45% smaller |

The size reduction becomes more impactful at higher wattages. A traditional 240W laptop charger weighs over a pound and takes up half your bag's accessory pouch. A GaN 240W charger weighs 8 ounces and fits in your palm.

The One-Charger Life

Here's the setup we use when traveling:

1. Anker Prime 100W charger ($59)
2. One USB-C cable for the laptop
3. One USB-C cable for the phone
4. One short USB-C cable for earbuds/watch

Three cables, one charger, zero adapters. Everything charges from one device that weighs less than most laptop chargers alone.

Read our full USB-C charger guide →

Read our full USB-C cable guide →

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