Xiaomi 20000mAh Mi Power Bank review: High quality for $25

Xiaomi is primarily known for its phones, but the vendor also makes a slew of accessories, including power banks. The latest product in this category is the 20000mAh Mi Power Bank, which offers the largest battery capacity yet.

The Chinese vendor approaches its accessories the same way it handles phones, which means that you can expect a well-designed power bank offering great value for money. And that's true for the brand new 20000mAh power bank as well, which is available for just ₹1,699, or the equivalent of $25.

Design and charging

The 20000mAh power bank comes in an environmentally friendly ABS plastic housing with a textured pattern aimed at improving grip. The design is a switch from the anodized aluminum casing seen on the 5000mAh, 10400mAh, and 16000mAh power banks. The plastic makes for a far better finish, as it doesn't make the surface of the power bank nearly as slippery as the aluminum design. The casing is also scratch-resistant, and can withstand heat up to 90 degrees Celsius (not that it gets that hot itself). With an overall weight of 338g, the power bank is lighter than the 350g 16000mAh version, which is impressive.

Going with a plastic case makes the battery much lighter, but keeps durability high.

The 20000mAh Mi Power Bank features six high-density batteries from Panasonic and LG, and has two USB ports that allow you to charge two devices simultaneously. The dual USB ports offer a combined output of 5.1 volts at 3.6 amps, which translates to 18.36 watts. Each port is capable of outputting up to 2.1 amps, and you can also use the power bank to charge USB Type-C devices. However, the output from a single port falls short of the recommended Quick Charge 2.0 spec, which means that you're looking at solid but generally longer charge times. You'll have to go elsewhere if you want a battery that can quickly juice up a dead Quick Charge phone.

There's a four-LED capacity indicator at the top of that shows the charge remaining, with each LED corresponding to a 25% charge. The power bank automatically switches on and off as soon as you connect a device, but there's a dedicated power button on the right as well. Xiaomi bundles a one-foot long flat micro-USB cable out of the box, but I prefer these Monoprice cables (opens in new tab).

The power bank has a micro-USB input for recharging, but there isn't a wall charger included in the box. I used a Tronsmart Titan (opens in new tab) — which delivers the suggested 12V/1.5A charge — and it took over eight hours for the power bank to fully charge.

Capacity and authenticity

Xiaomi 20000mAh Mi Power Bank

20000mAh is a lot of capacity, and to ensure that the power bank delivers all that power safely, Xiaomi uses what it calls "nine layers of circuit chip protection," which provides protection from circuits shorting out, input and output overvoltage, overcharge and overdischarge, output overcurrent, and more. The USB power control and charging chips are made by Texas Instruments, which are far more reliable than what's commonly used in products in this price range. As noted above, Xiaomi aims to use high-quality battery cells from reputable manufacturers as well, which not only keeps capacity figures consistent but also improves safety.

Xiaomi 20000mAh Mi Power Bank

Given Xiaomi's brand cachet and the nature of the hardware on offer, the vendor is susceptible to counterfeits from third-party sellers, who use low-quality batteries packaged in a similar casing. To combat the issue, Xiaomi issues a 20-digit security code on the packaging of the Mi Power Bank, which can be verified on its official website (opens in new tab). If you're buying a Xiaomi power bank from anywhere other than its own portal, a safe practice is to verify before using the power bank to ensure its legitimacy.

Should you buy it?

Xiaomi 20000mAh Mi Power Bank

For its asking price, the 20000mAh Mi Power Bank offers a lot — it has a huge capacity, output for two devices, good components and a rugged exterior. If you don't need Quick Charge speeds, it offers everything you'd need in a big portable battery.

As for availability, you can get your hands on the power bank directly from Xiaomi's official website in China (opens in new tab) and India (opens in new tab). Stock is released in limited quantities, so you have to wait until the next flash sale comes along to get your hands on one. As Xiaomi's website is inundated by hundreds of thousands of visitors during a flash sale, it is recommended to install the Mi Store app (opens in new tab) and buy the power bank through that instead. Both times we were able to procure the power bank were through the Mi Store app.

Those in the U.S. and other Western markets can buy the 5000mAh, 10400mAh, and the 16000mAh variants of the power bank from Xiaomi's global site (opens in new tab), but as of now the 20000mAh offering isn't available yet and the 16000mAh model is out of stock. The 5000mAh power bank retails for just $9.99, while the 10400mAh variant is available for $13.99. While the 20000mAh power bank offers a higher capacity, the internal circuitry and safety features are standard across Xiaomi's range.

See at Xiaomi U.S. (opens in new tab)

If you're looking for a battery with Quick Charge speeds, there's the $20 Aukey 10400mAh Power Bank (opens in new tab), which is Quick Charge 2.0 certified. There's also the $59 RAVPower 20100mAh Portable Charger (opens in new tab), which offers Quick Charge 3.0 as well as USB-C input.

Harish Jonnalagadda
Senior Editor - Asia

Harish Jonnalagadda is a Senior Editor overseeing Asia at Android Central. He leads the site's coverage of Chinese phone brands, contributing to reviews, features, and buying guides. He also writes about storage servers, audio products, and the semiconductor industry. Contact him on Twitter at @chunkynerd.

  • xiaomi's powerbanks are easily the top in the world. i've used plenty since the 1st version and it still works perfectly. needless to say, i have recommended them to my family and friends and they are all happy with it
  • No mention of the type of battery .....might be for a reason Posted via the Android Central App
  • Huh? "The 20000mAh Mi Power Bank features six high-density batteries from Panasonic and LG"
  • It says it uses six cells sourced from LG and Panasonic... Do you mean the chemistry? It's most likely lithium ion or maybe lithium polymer. It's best to assume I'm being sarcastic. if I'm ever serious I'll type "/s" to make it clear.
  • Though the article states USB C compatibility, does anyone have actual source that it is? Posted via the Android Central App
  • Using it to charge my Mi 5 right now.
  • Good to know, thanks Posted via the Android Central App
  • Why the hell is that "good to know?"who the hell cares what this dude is doing Posted via the Android Central App
  • Dude, sit down and have a snickers. It's best to assume I'm being sarcastic. if I'm ever serious I'll type "/s" to make it clear.
  • In your entire life, have you ever said anything positive?
  • But app isn't available in United States Posted via the Android Central App
  • lack of quick charge is a deal breaker for me these days
  • Does this support fast charging?
  • I've got the 16000 mah allmost for two yeara and ot works really good.. I will buy a second one, if it will have built in qi charger for a smartwatch. That would be an universal charger... Posted via the Android Central App
  • Hm I go for an ANKER because Quick Charge 3.0 to be future proof. My LG Flex 2 is supports Quick Charge 2.0 and I like it very much. Posted via Android Central App
  • Dang, thanks for the Mi Store app tip. I've been wanting to get one of their power banks for long but they are always out of stock. I have the older 5200 mAh variant and it still works great.
  • Nice review!
  • I got a problem with Xiaomi 20000 MAh power bank. I bought it about two months ago and one day it was suddenly heated up and started to liquidizing the housing from the edge of power Input and output ports when it was switched off. I showed it to one of my colleague (Electronics Engineer) and he suggested to disassemble the power bank and disconnect cells from the circuit because the heating up is going on. Then after the power bank was cooled down and we realized that it was short circuited. Couldn't find a reason for that. That was an original Xiaomi power bank and verified by the xiaomi web site.