You could have the newest phone on the market that claims to have exceptional battery life (and that claim could very well be true), and we’d still recommend that you get yourself a portable battery charger. Toting this helpful accessory around is the best way to prevent your phone from dying in a place where you don’t have access to a wall charger.

Anker and Belkin are the two most popular charger brands on the market right now, with both companies having tons of powerful options that are suitable for most cellphone owners. In fact, two affordable and similarly priced options are the Anker Nano Portable Power Bank and the Belkin Portable Charger.

The Anker Nano is a great choice if you care about speed and overall performance. It delivers much faster charging than most compact power banks, so you’ll notice your phone power up quickly. It also keeps things convenient with a built-in USB-C cable and a more advanced display, making it feel like a high-end, all-in-one charging solution.

The Belkin Slim is a good fit if you want something simple, thin, and flexible for everyday use. Its flatter design makes it easy to carry, and the dual USB-C ports are ideal if you need to charge two devices at once. While it’s not as fast as the Anker, it’s reliable, straightforward, and perfect for casual, day-to-day charging.

If you’re unsure about which device to pick, we pitted the two chargers against each other to see which one is the better option. It turns out there’s a battery pack that we feel is a little more worth it.

Key Differences: Anker Nano Portable Power Bank vs. Belkin Portable Charger

Charging Speed

Charging speed is usually the first spec people look at, as this directly affects how long you’ll be waiting for your phone to charge up. Higher wattage—like 45 watts on the Anker—means faster charging, especially for larger devices like tablets or laptops. But in real-world use, charging often slows down over time as batteries fill up, so that top speed is more about quick boosts than sustained performance.

On the flip side, 20 watts—like the Belkin—is more than enough for phones and will still get you to around 50 percent from 0 percent relatively quickly. It just won’t feel as fast when you’re in a rush.

Battery Capacity

Both of these sit at 10,000 milliampere-hours, which is the standard for everyday use. In practice, that usually translates to about 2 full phone charges, depending on your device and efficiency losses.

The key thing to understand: Capacity tells you how much power you have, not how fast it’s delivered. So even though these two are equal on paper here, they’ll feel very different in use because of charging speed.

Ports and Cables

Both the Anker and Belkin are supposed to be all-in-one solutions, meaning you get a built-in USB-C cable, plus an extra USB-C port so you don’t have to carry anything extra. Where they differ is in how they handle multiple devices at once.

The Belkin is more straightforward, as you can plug in two devices and it splits power in a more even way, making it feel reliable for casual multi-device charging. The Anker can also charge multiple devices, but it’s really optimized for single-device fast charging. This is because once you plug in more than one thing, speeds drop more noticeably.

In practice, that means both are convenient, but they cater to slightly different habits: the Belkin feels better for steady, shared charging, while the Anker is built for fast, focused top-ups when you need power quickly.

Size

Not all 10,000 mAh power banks feel the same in your pocket. Some are shorter and thicker, while others are flatter and more phone-shaped. This affects how you carry it: Thicker models, like the Anker, feel more compact in a pocket, while slimmer ones, like the Belkin, disappear in a bag or sleeve.

The Anker’s size may not be the smallest, but it still feels a bit sturdier than the Belkin. Therefore, you’d feel safer carrying this around knowing it won’t break in your bag or get damaged if it were to drop.

Display and Smart Features

The Anker Nano Power Bank has the more advanced display, showing real-time charging data, including battery percentage, output wattage per port, and even additional system information like temperature and charging behavior. That means you can actually see how fast your device is charging, and how the power is being distributed. This is useful if you care about performance or are charging multiple devices.

The Belkin keeps things much simpler. Its display is a straightforward battery percentage readout, so you know how much charge is left but not much else. There’s no insight into the other data, but that’s okay if all you really need to know is when the charger will die.

Bottom Line

At the end of the day, both of these power banks hit the same baseline: 10,000 milliampere-hour capacities, built-in cables, and the ability to charge two devices at once. The real difference shows up in how they prioritize power and modern tech specs. The Anker is built around speed and performance, pushing up to 45 watts for fast top-ups and even light laptop support, while the Belkin stays in the 20-watt range, which is more than enough for phones but not as advanced.

Where this matters in real life is simple: if you’re the kind of person who plugs in for 20 to 30 minutes between meetings, commuting, or at the airport, the Anker gives you noticeably more battery in less time. But if you’re just keeping your phone alive throughout the day, topping up slowly, or maybe charging two devices overnight, then the Belkin’s steadier, simpler approach is suitable.

That said, since these are both similarly priced, an easy winner for the money has got to be the Anker Nano Power Bank. It performs better and allows for a faster experience, and if you’re in a pinch that’s what matters the most.

Shop the Anker Nano Portable Power Bank

Shop the Belkin Portable Charger