Xiaomi UltraThin Magnetic Power Bank 5000 mAh 15W Review

There are two kinds of power banks in the market right now.

The bulky ones like the Anker Prime 12,000mAh that can charge your phone and laptop two to three times… and the ultra-slim magnetic ones that are designed purely for convenience.

This is clearly the second type.

The Xiaomi Ultra Thin Magnetic Power Bank 5000mAh 15W (MDY-20-EB) is built around one main idea: portability over capacity. At just 6mm thin and 98 grams this might be one of the slimmest magnetic power banks you can buy today.

But thin doesn’t always mean practical.

So the real question is, does this actually make sense for daily use?

Let’s break it down.

Design and Build Quality

The first thing you’ll notice is how absurdly thin this thing is.

At 6mm it almost feels like a metal card rather than a power bank. When you hold it, it doesn’t scream “battery pack.” It feels more like an aluminum accessory.

Our review unit comes in Glacier Silver, finished in matte metallic aluminum (to compare its a lighter version of the silver iPad). The texture is smooth, slightly cool to the touch, and doesn’t attract fingerprints easily.

One piece design, Build quality feels solid. No flex. No creaking. Edges are flat and a slight curvature with softly rounded corners.

The Xiaomi logo is subtle at the center, and the magnetic alignment ring is visible at the back.

Minimalist. Industrial. Clean.

At the bottom, you get a USB-C port. On the side, there’s a power button. Press it and you’ll see the four LED indicators light up, showing the remaining battery level.

Inside the box, you get:
• The power bank
• User manual
• Warranty notice

That’s it. No cable included.

Portability

This is where the Xiaomi Ultra Thin Magnetic Power Bank really stands out.

At 98 grams, you barely feel the added weight when attached to your phone. It doesn’t make the device feel top-heavy. It doesn’t create that awkward “brick at the back” sensation that thicker magnetic packs usually do. But you’ll still feel carrying an accessory at the back of your phone.

Even inside your pocket, it doesn’t feel bulky. it feels just holding 5 ATM cards.

And because it’s only 6mm thin, it maintains the original silhouette of your phone. That’s a big deal for people who prefer slim setups.

But! This isn’t meant to replace your main power bank.

This is meant to live in your pocket every day.

Honestly for a person like me who is always on the go I prefer bringing this versus my other powerbank like the Cherry 10,000mAh powerbank and Anker Prime 12,000mAh.

Since I always use shoulder bag, it doesn’t take too much space plus the size! again the same size as your credit cards.

Magnetic Strength and Attachment

Magnet strength can make or break a product like this.

We’ve tested generic magnetic power banks before, and most of the time, the magnet is the weak point.

In this case, Xiaomi did a good job.

The attachment is secure. It aligns properly on my iPhone 17 Pro Max and holds its position even when moving around.

Even with a phone case, the magnet remains strong enough for daily use. It doesn’t fall off easily with light movement or casual handling.

Compared to typical Shopee, Tiktok generic powerbanks, this is noticeably more stable.

Compared to UGREEN magnetic power banks I’ve tried before, it feels competitive in strength.

It’s not loose. It doesn’t shift randomly.

That gives you confidence to actually use it while walking.

Charging Performance

OK! Let’s manage expectations first.

This is a 5000mAh power bank. I’ll repeat! 5k mAh for 2026 you’ll be surprise why are they still making this capacity? But did you know that the Apple Air powerbank has only 3,149mAh.

That automatically tells you it’s not designed for full 0–100% charges on large flagship devices.

During our test with the iPhone 17 Pro Max, we started at around 50% battery. After draining the power bank completely, we ended up around 70%.

So roughly a 20% boost in real-world use.

That’s consistent with what you’d expect from a slim 5000mAh magnetic pack.

Wireless charging is rated at 15W (Android / Xiaomi Devices), but as with most wireless setups, actual charging speed is more moderate in practice.

But the catch? for iPhone devices its only rated at 7.5W MAX! you’ll definitely feel how slow the charging.

But It charges steadily. again, not aggressively fast.

This is more of a “top-up while commuting” type of device rather than a heavy-duty charging solution.

If you’re the kind of user who just needs a bit of juice to survive the commute before reaching your charger at home or in the office, this is practically built for that purpose.

Heat Management

Yes, it gets warm during wireless charging.

But manageable.

It’s warm to the touch, not hot. Not uncomfortable. No alarming overheating behavior during our tests.

Wireless charging naturally produces heat, and given the thin aluminum build, you will feel it slightly. But nothing out of the ordinary.

Safety Features

Like most powerbank Xiaomi still packed this device with a lot of safety features.

Electrostatic protection
Input overvoltage protection
Output overvoltage protection
Over-temperature protection
Output overcurrent protection
Undervoltage protection
Short-circuit protection
Over-discharge protection
Overcharge protection
Foreign object detection

Wired Charging Option

You also get USB-C wired charging.
The USB-C port supports:
• Up to 22.5W input
• Up to 20W output

So if you want faster charging compared to wireless, plugging in is the better option.

Wireless is about convenience.

Wired is about efficiency.

Recharging the Power Bank

Now here’s something impressive.

Using a 60W charger, we were able to recharge the power bank itself in roughly 30 to 45 minutes.

That’s fast for a device this thin.

So even if you drain it daily, topping it up before heading out won’t take long.

That’s actually one of the practical advantages here.

Compatibility

On the iPhone 17 Pro Max, automatic detection works instantly. Just snap it on and it starts charging.

No setup required.

However, when we tested it on the Vivo X300 Ultra, it did not work properly.

The reason? The camera module protrudes too much. Because of that, the power bank cannot sit flush at the back, preventing proper magnetic alignment.

So this device works best with:
• iPhones with MagSafe
• Phones with flat backs
• Devices without large camera bumps

It is not universally compatible with all Android phones.
That’s something buyers should consider. But for quick checking as long as the back of your phone fits a ATM card then most likely it will fit.

But Xiaomi did list the “Official Devices” that are compatible.

Xiaomi 15
Xiaomi 15 Ultra
Xiaomi
Xiaomi 14
Xiaomi 14 Ultra
Xiaomi 13 series
Xiaomi 12 series
iPhone 17 series
iPhone 16 series
iPhone 15 series
iPhone 14 series
iPhone 13 series
iPhone 12 series
Samsung Galaxy S25
Samsung Galaxy S25 Ultra
Samsung Galaxy S24 Ultra
Samsung Galaxy S23 Ultra
Google Pixel 10 Pro Fold
Google Pixel 10 Pro XL
Google Pixel 10 Pro
Google Pixel 10
Google Pixel 9 Pro XL
Google Pixel 9 Pro
Google Pixel 9

Specifications
• Model: MDY-20-EB
• Battery Type: Lithium-ion
• Rated Capacity: 5000mAh
• Wireless Charging Output: Up to 15W
• USB-C Input: Up to 22.5W
• USB-C Output (Wired): Up to 20W
• Dimensions: 98.5 x 71.5 x 6mm
• Weight: 98 grams
• Charging Port: USB Type-C (Input & Output)
• Indicators: 4 LED battery indicators
• Color: Glacier Silver, Graphite Black, Orange

What We Like
• Extremely thin at 6mm
• Lightweight at 98 grams
• Premium aluminum finish
• Strong magnetic attachment
• Fast recharge time (30-45 minutes)
• USB-C input and output
• Clean minimalist design

What We Don’t Like
• Limited capacity (5000mAh only)
• Wireless charging is not very fast in real-world use
• Gets warm during charging
• Not compatible with phones that have large camera bumps
• No cable included

Verdict

The Xiaomi Ultra Thin Magnetic Power Bank 5000mAh 15W is not built to be the most powerful magnetic power bank in the market.
It’s built to be the most convenient.