Finding the best 20,000 mAh powerbank
31-12-2025
Translation: Patrik Stainbrook
Power on the go: I tested ten popular powerbanks from our store, all capable of 20,000 mAh. I was surprised by which model won out.
Powerbanks are the ideal solution for charging everyday gadgets on the go, but with almost 3,500 models in the range, it’s a tricky choice. I’ll show you the real differences between the best models.
For my grand comparison, I selected ten popular powerbanks with a capacity of 20,000 mAh. It’s one of the most popular sizes for mobile charging, since it can be used to fill up smartphones several times over or provide enough juice for a notebook.
I’ll compare the models across five categories, each of which awarding a maximum of five points. At the end, I’ll put together all the points and deliver a weighted ranking.
Not every 20,000 mAh model is created equal
The models in this comparison are advertised with a capacity of 20,000 mAh. Sure sounds like all the devices should be equally powerful, right? But that’s just not true. The milliampere hours (mAh) unit has become commonplace, but it’s still imprecise.
More precisely, all 20,000 mAh means is that a powerbank supplies 20,000 milliamps (mA) for one hour – or 2,000 mA for ten hours. However, a differing voltage will have an impact on power output (in watt hours). Consequently, watt hours (Wh) is really the correct unit for battery capacity.
In my test, every one of the ten models also have different power capacities: from 72 to 77 Wh. You can find this information on the battery, in the instructions – or in our store.
By the way, make sure to read the watt-hour information in the small print before you board a flight at the latest. The aviation industry measures power capacity correctly, and sets limits in watt hours. Powerbanks up to 100 Wh are usually allowed in hand luggage.
Price: one of the models I tested is really cheap
The prices mentioned here are those taken on 29 December 2025 Since they can fluctuate, I’ve also taken price changes over the last few weeks into account for my points system. You can call up price information for each product in our store in the Price trend section.
Intenso XS20000, 74 Wh: at around 17 francs over the past few weeks, it’s by far the cheapest model.
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Samsung PD Super Fast, 74 Wh: 31 francs, rarely under 30.
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Varta Wireless Power Bank, 74 Wh: 33 francs, its lowest price for a while now.
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Veger W2068, 77 Wh: 35 francs, sometimes drops to 31 francs.
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Aukey Spark Mini, 77 Wh: 35 francs, price rarely falls below 30.
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Belkin BoostCharge, 74 Wh: 39 francs, often sells for 31 francs.
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Ugreen Nexode, 72 Wh: 41 francs, sometimes drops to 36 francs.
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Xtorm Fuel Series 5, 74 Wh: 49 francs, sometimes as low as 32 francs.
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Xiaomi Mi Power Bank, 74 Wh: 49 francs, regularly under 40.
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Anker Power Bank, 72 Wh: at 74 francs, it’s much pricier than the other models, priced around only 40 francs.
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Pricing verdict: the Intenso model is significantly cheaper than the competition at less than 20 francs. Plenty of the other devices cost 30 to 40 francs. The Anker powerbank is the most expensive as of my cut-off date – mind you, prices can still fluctuate widely.
Speed: charging four times as fast
When I charge my MacBook Pro with a powerbank, I can measure the actual everyday charging speed with a multimeter. While most smartphones rarely charge faster than 20 or 30 watts by cable, the situation is different for laptops. They allow between 60 to 100 watts, leading to massive differences in charging times. The test proves just as much. Ugreen’s model charges four times quicker than the slowest and cheapest powerbank from Intenso.
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Ugreen Nexode, 72 Wh
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Anker Power Bank, 72 Wh
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Samsung PD Super Fast, 74 Wh / Xiaomi Mi Power Bank, 74 Wh
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Veger W2068, 77 Wh / Belkin BoostCharge, 74 Wh / Xtorm Fuel Series 5, 74 Wh
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Aukey Spark Mini, 77 Wh / Intenso XS20000, 74 Wh / Varta Wireless Power Bank, 74 Wh
Speed verdict: the differences are massive. Only Ugreen and Anker models, for example, can charge laptops at high speed. The cheaper models from Aukey, Intenso and Varta are way slower.
Actual capacity: not a single powerbank can handle four phones
According to my data sheet, the powerbanks all offer a similar capacity, namely 20,000 mAh or 72 to 77 Wh. But there are definitely differences in everyday use.
To measure this, I charged four smartphones one after the other using each power bank: a Google Pixel 8 (4,575 mAh), Realme GT 6 (5,000 mAh), Nokia G42 (5,000 mAh) and a Xiaomi 13 Lite (4,500 mAh). This way, the power banks are exposed to different speeds and charging management. I then noted how many phones were fully charged. My first two phones all made it, but only five out of the ten models fully charged three of my smartphones.
Only two models managed more than 15,000 mAh all in all, while the worst powerbank didn’t even manage 13’000 mAh.
Since all ten power banks had to charge the same smartphones under the same conditions, this everyday test is clearly relevant. Actual figures may vary depending on the circumstance.
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Aukey Spark Mini, 77 Wh / Intenso XS20000, 74 Wh
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Xtorm Fuel Series 5, 74 Wh / Belkin BoostCharge, 74 Wh / Xiaomi Mi Power Bank 74 Wh
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Veger W2068, 77 Wh / Samsung PD Super Fast, 74 Wh / Anker Power Bank, 72 Wh / Varta Wireless Power Bank, 74 Wh
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Ugreen Nexode, 72 Wh
Capacity verdict: the two worst models only have a capacity of 72 Wh. They also charge devices the fastest – which presumably reduces efficiency.
Weight and size: astonishing differences
Veger W2068, 77 Wh: although the Veger model has a higher capacity than many others, it’s the most compact and lightest power bank in this line-up. However, its USB-C cable sticks out like a loop.
Weight: 304 grammes
Length: 11.5 cm
Width: 7 cm
Thickness: 2.5 cm
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Aukey Spark Mini, 77 Wh: in second place, another 77 Wh powerbank. It’s slightly heavier and thicker, but also the shortest model in this test.
Weight: 320 grammes
Length: 11.1 cm
Width: 7 cm
Thickness: 2.8 cm
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Intenso XS20000, 74 Wh: this model is just as wide and thick as the two smallest models. Overall, the powerbank is still more compact and lighter than many of its competitors.
Weight: 347 grammes
Length: 12.7 cm
Width: 7 cm
Thickness: 2.5 cm
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Xtorm Fuel Series 5, 74 Wh: like the two following models, this Xtorm powerbank is very much average. It is quite thick, though.
Weight: 384 grams
Length: 14.3 cm
Width: 7.2 cm
Thickness: 2.8 cm
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Samsung PD Super Fast, 74 Wh: Samsung’s battery is slightly heavier, wider and longer than the Xtorm model – but thinner.
Weight: 395 grams
Length: 15.1 cm
Width: 7.5 cm
Thickness: 2.5 cm
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Belkin BoostCharge, 74 Wh: this one’s long, wide and weighs almost 400 grammes. However, it is thinnest overall.
Weight: 396 grams
Length: 15 cm
Width: 7.7 cm
Thickness: 2.4 cm
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Ugreen Nexode, 72 Wh: we’ve now reached the weight class above 400 grams. The Ugreen Nexode is the thickest model in my comparison.
Weight: 422 grams
Length: 13.8 cm
Width: 8 cm
Thickness: 2.5 cm
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Anker Power Bank, 72 Wh: the Anker model is similarly weighty, but slightly longer.
Weight: 424 grams
Length: 15.5 cm
Width: 7.2 cm
Thickness: 2.5 cm
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Xiaomi Mi Power Bank, 74 Wh: Xiaomi’s model looks about the same length as the Anker.
Weight: 438 grams
Length: 15.3 cm
Width: 7.2 cm
Thickness: 2.7 cm
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Varta Wireless Power Bank, 74 Wh: Varta’s battery is the heaviest and longest in this test. But, like the Belkin, it’s thinner than all the others.
Weight: 444 grams
Length: 15.8 cm
Width: 7.6 cm
Thickness: 2.4 cm
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Size and weight verdict: the differences in size here are considerable, as you can see from my photo. The lightest model weighs 140 grams less than the heaviest. Our shortest powerbank comes in at eleven centimetres in length with a similar shape, the longest at almost 16 centimetres. There are hardly any differences in thickness: all ten models are between 2.4 and 2.8 centimetres.
Connections and equipment: endless sockets and integrated charging cables
Veger W2068, 77 Wh: Veger surprises me with two integrated cables. Older iPhone users will be delighted with the Lightning connection. The USB-C cable is ultra-sturdy, and also serves as a carrying strap – ingenious! Veger’s model can be charged via this cable or via the second USB-C port. There’s even a USB-A socket. The battery also has a small screen displaying the remaining capacity as a percentage. Its control button is somewhat hidden on the back, but the build quality appears solid.
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Ugreen Nexode, 72 Wh: a USB-C port serves as both input and output; plus there’s a second USB-C port and a USB-A socket. A display on the side shows the percentage capacity of the battery. Overall, the Ugreen model looks very high-quality.
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Anker Power Bank, 72 Wh: in addition to the USB-C socket, an integrated USB cable is used to charge the powerbank itself and supply devices with power. The third output is a USB-A port. This powerbank’s charge level is shown as a percentage on a display, with the corresponding power button right next to it. Overall, the powerbank looks very high-quality.
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Xtorm Fuel Series 5, 74 Wh: with its honeycombed silicone surface, this powerbank is truly comfortable and robust at the same time. Xtorm relies on two USB-C and one USB-A port. Both USB-C variants serve as inputs and outputs. There’s also a button I can press near the small screen on the side, displaying the remaining power.
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Varta Wireless Power Bank, 74 Wh: uniquely, Varta is the only manufacturer to offer the option of charging a smartphone wirelessly. A Qi charging pad is integrated at the top – unfortunately, without the option of attaching the phone magnetically. The powerbank is charged via its single USB-C port, plus two USB-A outputs. It’s switched on and off using a button, with four white LEDs next to it indicating the status. The plastic is somewhat rough, but looks robust.
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Samsung PD Super Fast, 74 Wh: Samsung’s model is the only one with three USB-C ports, all of which serve as input and output simultaneously. The manufacturer has dispensed with a USB-A port. Four white LEDs indicate the charging status, and everything’s controlled by a small button. The powerbank has a high-quality finish, and the beige colour stands out pleasantly from the other black and white models.
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Belkin BoostCharge, 74 Wh: a USB-C port and a USB cable serve as input and output. There’s also one USB-A port. A button lights up four white LEDs to indicate how long the powerbank can still go. The Belkin model has a robust finish.
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Xiaomi Mi Power Bank, 74 Wh: this device has only one USB-C port used to charge the powerbank; it also serves as an output. There are also two USB-A ports. Otherwise, the Mi Power Bank is kept simple: four LEDs show the charging status, a button switches the device on and off. With its matt black surface, the device looks fancy too.
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Intenso XS20000, 74 Wh: the white plastic here feels cheap. Surprisingly, the manufacturer has included a micro USB socket as a second charging option alongside USB-C. The simple features include a USB-A port, a power button and four blue LEDs for the charging status.
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Aukey Spark Mini, 77 Wh: the small powerbank has two ports: one USB-A and one USB-C. There’s also a button and four white LEDs to indicate the charging status. All very simple – at least the finish looks high-quality.
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Connections and equipment verdict: you’re best off checking closely here, you’ll find some significant differences. For example, only three models have an integrated USB-C cable. The number of ports also differs, with the cheaper models usually only having one USB-C port.
Final ranking: a surprising winner
Adding up all the points, the Veger W2068 wins out in the end with 19 points – a surprising victory for a little-known brand. The powerbank impresses with its compact design, endless connections and low price. It doesn’t fall too far behind in terms of charging speed and capacity either. This makes the model a perfect all-rounder for users without special requirements.
But wait, how does the ranking change if your priorities are charging speed and capacity? To figure this out, I tripled the points in those areas.
Now the Ugreen model has overtaken the Veger powerbank. So, if you’re looking for as much power as possible, this model is even better – mainly thanks to the unrivalled charging speed shown in my comparison.
However, there are good reasons to opt for a completely different model. If you want the cheapest possible model to charge devices at a slow speed from time to time, the affordable powerbank from Intenso is a good choice. If a cable integrated directly into the battery is a priority, the models from Veger, Anker or Belkin are suitable. Samsung is the only model to offer three USB-C ports, while Varta offers a wireless charging option.
Which powerbank have you had good experiences with? Put it in the comments.
Lorenz Keller
Senior Editor
Lorenz.Keller@digitecgalaxus.chGadgets are my passion - whether you need them for the home office, for the household, for sport and pleasure or for the smart home. Or, of course, for the big hobby next to the family, namely fishing.
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