Aspire K1 vs. K2 vs. K3 vs. K4: What's the Best Aspire Vape Pen?

You could make an argument that no company in the vaping industry has a better history than Aspire when it comes to creating vaping devices that really work for beginners. If you look in any well-stocked vape shop, you’re going to see a selection of small Aspire vape pens because beginning vapers love them. Aspire has a great bunch of products in its K-series vape pens. The only problem is that the products are so similar that they’re sometimes confusing – both to customers and to vape shop owners. Even Aspire’s website doesn’t do a great job of explaining how the K1, K2, K3 and K4 vape pens compare. Who should buy which product? Are the tanks interchangeable? Are the coils interchangeable?

Those are some of the questions that we’re going to answer in this article. This is your straightforward comparison of the Aspire K1 vs. K2 vs. K3 vs. K4. Let’s begin!

Aspire K Series: Tank and Coil Compatibility

Before we dig in and discuss the individual products, let’s talk a bit about tank and coil compatibility.

• Tanks for the Aspire K1, K2 and K3 will work with the K1, K2 and K3 batteries. However, the Aspire K3 is wider than the K1 and K2. If you use the K3 tank with the K1 or K2 batteries, there will be some overhang. The Aspire K4 includes the Aspire Cleito tank. The Cleito tank will not work with the Aspire K1, K2 or K3 batteries.
• The Aspire K1 and K2 tanks use the same coils.
• The Aspire K3 uses the Aspire Nautilus BVC coil. The coil will not work with Aspire K1, K2 or K4 tanks, but it will work with Aspire Nautilus tanks.
• The Aspire K4 uses the Aspire Cleito coil. The coil will not work with Aspire K1, K2 or K3 tanks, but it will work with Aspire Cleito tanks.

Aspire K1

• Battery Capacity: 900 mAh
• Tank Capacity: 1.5 ml
• Coil Resistance: 1.6 ohm
• Coil Technology: Aspire BVC
• Price: $39.77
• Buy It Now

Summary: Buy the Aspire K1 if you’re interested in a super reliable vape pen that’s been tested and proven over multiple years on the market.

The Aspire K1 is vintage vaping through and through. In an age when you can usually expect a vaping kit to include two atomizer coils at the absolute most, the Aspire K1 is a truly complete vaping starter kit that includes no less than six coils. That’s enough supplies to potentially keep you vaping for months – and when you finally do need to buy replacement coils, you’ll love the cost; Aspire general BVC coils cost just $9.77 per five-pack. This device is old-school vaping design at its finest, from the carbon fiber battery coating to the decision to use a metal button rather than a plastic button. You simply won’t find another vaping kit like this one anywhere else.

Aspire K2

• Battery Capacity: 800 mAh
• Tank Capacity: 1.8 ml
• Coil Resistance: 1.6 ohm
• Coil Technology: Aspire BVC
• Price: $29.77
• Buy It Now

Summary: Buy the Aspire K2 if you’re interested in a slightly updated version of the Aspire K1 technology or simply want to spend a few dollars less for your vape pen starter kit.

The Aspire K2 is essentially the same device as the Aspire K1 in a slightly more affordable package and with less included accessories. While the Aspire K1 kit includes six total coils, for example, the Aspire K2 kit includes two coils. The Aspire K2 is a slightly newer vaping system, though, and it has a more modern appearance than the Aspire K1 as a result. The actual experience of using the two devices, though, is virtually the same because the two devices use the same Aspire general BVC coils.

Aspire K3

• Battery Capacity: 1,200 mAh
• Tank Capacity: 2 ml
• Coil Resistance: 1.8 ohm
• Coil Technology: Aspire Nautilus BVC
• Price: $34.77
• Buy It Now

Summary: Buy the Aspire K3 if you’d like to enjoy a modern mouth-to-lung vaping experience with all-day battery life and Aspire’s most famous coil technology.

If you’re new to vaping and haven’t heard of the Aspire Nautilus tank, you will learn about it as soon as you begin to read about the history of vaping. The Aspire Nautilus has been around for years, and it’s still one of the vaping community’s top picks among tanks designed for mouth-to-lung inhaling. If you want a vape pen that’s capable of giving you a boldly flavored mouth-to-lung vaping experience – one that’s very comparable to the experience of smoking a cigarette – the Aspire K3 vape pen is an excellent choice. The Aspire K3 uses the same Bottom Vertical Coil technology as the Aspire K2 and K1 vape pens, so it gives you the same high-quality flavor. With its larger coil, though, the Aspire K3 generates bigger vapor clouds and can support your longest, deepest puffs without going dry and burning the wick.

Aspire K4

• Battery Capacity: 2,000 mAh
• Tank Capacity: 3.5 ml
• Coil Resistance: 0.27 ohm
• Coil Technology: Aspire Cleito
• Price: $39.77
• Buy It Now

Summary: Buy the Aspire K4 if you want a sleek vaping device with truly impressive vapor production. This is a tiny vape pen for cloud chasing; it is designed for a direct-to-lung inhaling style.

The Aspire K4 might bear the K name, but apart from the name – and the fact that it’s a vape pen – the K4 has little in common with its predecessors. When they created the K4 vape pen, Aspire broke with tradition and coupled its device with a much more powerful tank designed for direct-to-lung inhaling. Like the Nautilus, the Aspire Cleito is an extremely famous vaping tank with a great deal of history. The Cleito was the first mainstream vaping tank with a coil that connected directly to the mouthpiece rather than a separate chimney. The result was a direct-to-lung cloud chasing tank with pure, bold flavors like no one had ever seen. Today, vaping tanks without chimneys are the rule rather than the exception. With the Aspire K4, you can experience the magic of the Cleito tank for yourself in a package small enough to carry in your pocket. The K4 is an absolute must if you want big clouds but don’t want to own a bulky vaping device.