Anker Nano Power Bank (5K MagGo Slim) Review

We’ve been testing the Anker Nano Power Bank (5K MagGo Slim) for about a month now, including a two-and-a-half-week trip through Tanzania, and it’s quickly become one of our favorite travel companions. From the moment we unboxed it, it felt different from your standard chunky power bank. Its slim, sleek, and curved design makes it comfortable to hold while still attached to your phone. If you’ve ever tried carrying a MagSafe battery in your pocket, you know it can get awkward—this one just works.

Aesthetically, it’s minimalist and modern. The glossy surface is eye-catching, though it’s not immune to fingerprints and smudges, and the Anker branding does wear off after heavy use. That said, we’re not overly concerned about that—it’s a cosmetic thing. What matters most is whether it keeps our devices charged when we’re off the grid, and in that regard, this little powerhouse more than delivers.

The Rundown

Raw functionality is where the Anker Nano Power Bank (5K MagGo Slim) really shines. It’s 7.6 millimeters thick (0.3 inches) and weighs just 122 grams (4.3 ounces), which makes it one of the most pocketable MagSafe battery banks we’ve tested. Despite its small size, it packs a 5,000mAh battery, enough for a few partial charges on iPhones from the 12 through 16 series. We found it perfect for topping up our phones throughout the day without needing a full, bulky charger.

The MagSafe compatibility is seamless. The curved design helps it fit snugly against the back of the phone, and holding it in your hand feels natural. It’s Qi2-compatible, allowing 15W MagSafe wireless charging for iPhones 12–16 and 5W wireless charging for AirPods with compatible cases. The USB-C port also supports 20W fast charging, which is handy when you need a quick boost or want to recharge the battery bank itself. Pass-through charging works as expected, so you can charge your phone while the battery bank is plugged in.

Temperature management is another highlight. Anker built an advanced cooling system that keeps the battery under 104°F (40°C), which we found effective. It does get warm, especially when pushing out a full charge, but that’s typical of small wireless chargers. Comfort-wise, we never felt like it was too hot to hold, and the curved shape makes it easy to keep your phone in your hand while charging. While we wouldn’t recommend charging your phone while you’re baking under a blistering sun, comfort isn’t out of the question if you’re, say, just strolling across the airport.

For anyone whose phone struggles to stay charged after a long day or a new iOS update, this power bank is a lifesaver. During an estate-sale-hopping weekend, our iPhone battery was tanking fast, but the 5K MagGo Slim kept us topped up without adding bulk or weight to our pockets. It’s not designed to take a dead phone to 100%, but it’s perfect for keeping you functional through a busy day or travel-heavy weekend.

Quick Comparison

When we compare the Anker Nano Power Bank (5K MagGo Slim) to other small MagSafe batteries, a few things stand out. Apple’s iPhone MagSafe Battery (the one they’ve designed for the battery-anemic iPhone Air) is slightly thinner but has less capacity, making it less capable than the Nano. Meanwhile, third-party options like the INIU SnapGo P71-E1 Qi2 MagSafe Power Bank or Clutch Pro offer similar designs with varying build quality and reliability. Some cheaper brands might include fun features like a kickstand or decorative elements, but we found the materials less durable and the charging experience slightly inconsistent.

In terms of capacity versus size, the Anker Nano strikes a nice balance. It’s slightly thicker than some alternatives, but it gives you 5,000mAh of usable power in a form factor that’s still pocket-friendly. The secure magnetic attachment makes it feel like an integrated part of your phone rather than an add-on. Build quality is consistent with Anker’s reputation—durable, dependable, and designed to last. For anyone traveling with an iPhone 12–16, we’d pick the Nano MagGo Slim over cheaper alternatives every time, even if it costs a few dollars more.