Ugreen MagFlow 20000 (Qi2)
(12 reviews)
The biggest of the magnetic packs: 20,000 mAh, certified Qi2 at 25 W and 45 W wired, to last a whole weekend without looking for a socket.
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Characteristics
- Capacity: 20,000 mAh (74 Wh)
- Wireless: Certified Qi2 25 W, 17 N52 magnets
- Wired: 45 W with built-in USB-C cable
- Outputs: 2 USB-C + USB-A + induction (4 devices)
- Qi2 25 W and 20,000 mAh, four devices at once
Detailed overview: Ugreen MagFlow magnetic 20,000 mAh Qi2 power bank
The Ugreen MagFlow 20,000 mAh holds a particular place in the magnetic power bank category. Most MagSafe-compatible models stop at 10,000 mAh to stay slim and light; Ugreen takes the opposite view and offers double the capacity, accepting a more generous format. The result is a pack able to last a whole weekend where others cover a day.
Its second argument is the Qi2 standard. Certified at 25 W for wireless charging, it belongs to the generation that moved induction from 15 to 25 W, clearly narrowing the gap with wired. In practice, a recent iPhone placed on the pack regains autonomy at a usable rate, no longer drop by drop. Seventeen N52 magnets provide a hold of around 9 newtons, enough to handle the phone one-handed without the pack detaching.
On the wired side, a USB-C cable is built into the casing and delivers up to 45 W. That is well above the usual 20 to 30 W on this type of product: enough to charge a smartphone at full speed, a tablet, or rescue an ultraportable. The pack offers in total two USB-C ports, a USB-A port and the induction surface, letting you feed up to four devices simultaneously, with intelligent power distribution.
That same USB-C port handles recharging the pack, also at 45 W, for a full cycle in about three and a half hours. At 20,000 mAh, around 74 Wh, it remains cabin-legal with no special procedure. Its dimensions of 111 x 70 x 33 mm for 410 g place it among bag packs rather than pocket ones, the logical price of this capacity.
It therefore suits heavy battery users: multi-day travellers, photographers, users charging several devices in parallel. For light daily use, a 10,000 mAh magnetic model will remain more pleasant to carry.
Full specifications
Detailed characteristics
Battery
| Rated capacity?Cell capacity in milliamp-hours, as stated by the manufacturer. | 20000 mAh |
|---|---|
| Actual energy?Actual stored energy in watt-hours; what matters for runtime and air travel (100 Wh cabin limit). | 74 Wh |
| Battery chemistry?Cell type; LFP lasts longer, Li-ion/LiPo is lighter. | Li-ion |
Output (device charging)
| Max output power?Maximum total power delivered; above 60 W it can charge a laptop. | 45 W |
|---|---|
| USB-C ports?Number of USB-C ports and the fastest port's power. | 2 × 45 W |
| USB-A ports?Number of USB-A ports and maximum power. | 1 × 22.5 W |
| Fast-charge protocols?Supported fast-charge standards (PD, QC, PPS…); PD/PPS is the most universal. | USB PD, Qi2 |
| Wireless charging (Qi)?Inductive charging of a phone placed on top, and its power. | Yes (25 W) |
| Magnetic attachment (MagSafe)?Attaches magnetically to the back of a MagSafe-compatible iPhone. | Yes |
Recharging the power bank
| Recharge power (input)?Maximum input power to recharge the power bank; higher means faster. | 45 W |
|---|---|
| Recharge time 0-100%?Time to fully recharge the power bank. | 210 min |
| Pass-through charging?Can charge a device while being recharged itself (pass-through). | Yes |
Cable and interface
| Built-in cable?A cable is permanently attached to the power bank (nothing extra to carry). | Yes |
|---|---|
| Retractable cable?The built-in cable retracts into the housing. | No |
| Cable included?A cable is included in the box. | No |
| Display?Level display: simple LED indicators or a digital screen (%, watts). | LED indicators |
| LED light?Built-in LED torch / light. | No |
Form factor
| Weight?Weight of the power bank, in grams. | 410 g |
|---|---|
| Dimensions (L × W × D)?Length × width × depth, in millimetres. | 111 × 70 × 33 mm |
Warranty
| Warranty?Length of the manufacturer's warranty. | 2 years |
|---|
⚡ How many charges with this power bank?
With 74 Wh of capacity, the Ugreen MagFlow 20000 (Qi2) power bank recharges iPhone 16 ~3.9 times or Samsung Galaxy S25 ~3.5 times.
| Smartphone | Charges |
|---|---|
| iPhone 12 | ~4.9 |
| iPhone 14 | ~4.2 |
| iPhone 17 | ~3.8 |
| iPhone 15 Pro Max | ~3.1 |
| Tablet / console | Charges |
|---|---|
| PlayStation Portal | ~3.3 |
| Retroid Pocket 5 | ~2.8 |
| iPad Air (M3) | ~1.8 |
| iPad Pro | ~1.7 |
Rough estimate: real-world losses (conversion, cable, heat) are around 25 to 35%.
Comparison
Around 90 euros, the Ugreen MagFlow 20,000 compares to high-end magnetic packs, via searches like "20000 mAh magnetic power bank" or "Qi2 25W power bank". Here is how it stands against three alternatives: the Ugreen MagFlow 10000, the Anker Zolo magnetic and the Ugreen Nexode 10000.
| Criterion | Ugreen MagFlow 20000 | Ugreen MagFlow 10000 | Anker Zolo magnetic | Ugreen Nexode 10000 |
|---|---|---|---|---|
| Capacity | 20,000 mAh | 10,000 mAh | 10,000 mAh | 10,000 mAh |
| Wireless charging | Qi2 25 W | Qi2 15 W | Magnetic | Magnetic |
| Wired power | 45 W | ≈ 30 W | 30 W | ≈ 30 W |
| Simultaneous devices | 4 | 3 | 2 | 2 |
| Observed price | ≈ 90 € | ≈ 50 € | ≈ 50 € | ≈ 35 € |
In short, the MagFlow 20,000 is the only one in the group to combine doubled capacity, certified Qi2 at 25 W and 45 W wired, with four devices powered in parallel. The 10,000 mAh models remain lighter and notably cheaper, making them better daily companions. But if your problem is surviving a weekend or a long trip without a socket, the MagFlow 20,000 is the one that goes the distance.
Related video
Video: UGREEN MagFlow 20000mAh Qi2 25W Magnetic Power Bank with Built-in USB-C Cable Unboxing - Published on 09/12/2025
Our tester's review: Guillaume Hoarau
We tested this MagFlow as a weekend pack, and its capacity genuinely changes how you use it. With 20,000 mAh in a magnetic format, you stop counting charges: an iPhone goes back to full three times, with enough left to rescue earbuds and a watch. Certified Qi2 at 25 W is immediately noticeable against older 15 W MagSafe packs, wireless charging finally becomes a real solution rather than a slow fallback. The magnetic grip is firm with its seventeen magnets: the phone does not slide, even while walking. The built-in 45 W USB-C cable is the other pleasant surprise, charging an iPhone at maximum speed and even rescuing a sleeping ultraportable. Being able to feed four devices at once, one of them wirelessly, makes it a genuine travel hub. The two caveats are linked: at 410 g this is no longer a pocket pack but a bag one, and the 33 mm thickness shows when stuck to the back of a phone. If you want lightness, a 10,000 mAh model remains more suitable; if you want never to run flat, this one is built for it.
Frequently asked questions: Ugreen MagFlow magnetic 20,000 mAh Qi2 power bank
Qi2 is the standard that moved wireless charging from 15 to 25 W. On a compatible iPhone, it clearly shortens induction charging time and brings the experience closer to a cable.
Its 20,000 mAh, around 74 Wh, allow roughly three full charges of a recent iPhone over a cable. Wirelessly, expect a little less, as induction is less efficient than a cable.
Yes. Its seventeen N52 magnets provide a holding force of around 9 newtons, enough to use the phone one-handed or walk with it, without the pack coming off.
Yes. At around 74 Wh, it stays under the 100 Wh limit applied by most airlines for cabin baggage, with no special authorisation.
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Published on 25/07/2026