Xiaomi Power Bank 4i 20000mAh 33W Super Fast Charging PD | Power Delivery | QC 3.0|Type C Input & Output |Triple Output Ports|Blue|Supports Android,Apple, Tablets, Earbuds, Watches etc (MI)

The Xiaomi 4i 20000mAh power bank delivers solid performance overall, but it’s not without some drawbacks.PROS:1). High Capacity & Fast Charging => The 33W PD fast charging works well for most devices, including phones, tablets, and earbuds. It can charge my phone multiple times without issue.2). Triple Output Ports => Useful for charging multiple devices at once. The combination of USB-A and Type-C ports is convenient.3). Type-C Input & Output => Charging the power bank with Type-C is fast and efficient, which is a big plus.CONS:1). Bulky & Heavy => It’s on the heavier side, which makes it less travel-friendly. Not ideal if you’re looking for something portable.2). Plastic Build Feels Basic => The build quality is okay, but the plastic body doesn’t feel as premium as some other options in this price range.3). Heating During Fast Charging => Gets slightly warm during fast charging, especially when charging multiple devices.---FINAL VERDICT =>If you need a high-capacity power bank with decent fast-charging support, the Xiaomi Power Bank 4i is a reliable option. However, its bulk and basic design may not appeal to everyone. A balanced product overall – not perfect, but dependable.

When I bought this Powerbank, I didn't found a detailed review regarding this but now as I have used and tested this Powerbank (20000 mAh variant) for 7 days, so I think I'm eligible to write a detailed review for this. Mainly I will write this review based on 4 points, build quality, charging time of powerbank, charging speed and battery backup. So let's start.1. Build Quality : The build quality of this Powerbank feels quite solid & nice. Its sandstone design texture and round edges makes its grip solid in hands & quite comfortable to hold. Before this I used to have Redmi Powerbank (20000 mAh) which in comparison to this Mi Powerbank feels little ugly in terms of design and uncomfortable to hold. Mi Powerbank feels less wider, thinner & more premium as compared to the previous one.2. Charging Time of Powerbank : The day I received this Powerbank, its LED indicators showed 2 LEDs blinking which means it had battery level between 25% to 50%. So before using it for the first time, I charged it fully using my standard 10W charger.One should also note that charging time of Powerbank along with the adapter also depends on what type of cable you are using. Using an old type C cable will take more time to charge it, as current carrying capacity of the cable decreases with time due to frequent usage. Although my 10W adapter is quite old but I have a new type C cable which supports fast charging, so I charged my powerbank with this setup and it took around 8 hours to charge it fully. So you can expect to charge it from 0 to 100% in around 11-12 hours using a 10W charger. Whereas if you use a fast charger like 33 Watt, 65 Watt etc. then ofcourse the powerbank will charge at a faster rate but it will also affect the efficiency and thermals of the powerbank in a negative way in the long run, so keep that in mind.3. Charging Speed Test : I tested the charging speed provided by this powerbank using 3 different type C cables to charge my 4000 mAh mobile device. Each time I charged my device to 80% using different cables (in second case I forgot to check & it got charged up to 90%) and noted the overall time it took to charge the device. All the results are attached in order as screenshots for reference.In first case, I charged it with my 2 yr old type C cable which although supports fast charging but the results were not impressive. (Time 1h 43 min Pic)In second case, I charged it with a new type C cable which came with my tws earbuds but it does not supports fast charging and the results were relatively better as compared to the first case. (Time 1h 58min Pic)In third case, I charged it with the type C cable which comes inside the box of this powerbank and supports fast charging, and in this case I got the most impressive results. The device got charged to 50% in just 30 min, and 80% in 1h 8min. (Time 1h 8min Pic)So, it shows that the cable also plays a very important role in fast charging your device which many people ignore.4. Battery Backup : Other than the above mentioned test results I charged my mobile 3 more times but didn't noted the charging time. So all in all, till now I have charged my device to a total of 406% in 6 different rounds (80% + 94% + 80% + 44% + 82% + 31%) and still 3 LED lights of powerbank are blinking which literally amazed me considering the negative reviews I read about its battery backup before buying it.So, overall I would say you can buy this powerbank if it suits your requirements and budget. Also if you buy this powerbank then I would suggest you to charge it fully before using it for the first time and test other things during that 7 days replacement period, so if you find any issues with it, you would be able to replace it. I used AccuBattery app to record the battery percentage & time it took to charge my phone.P.S : Will update the review in future if felt the need to do it.

Great product. Charges iphone 15pro to full charge 4 times atleast.. charged my gopro as well . Its a bit bulky and heavy but thats because of the 20,000 mah power as well . Definitely worth the price .

Good product,20,000 mAh power bank, 1 type c port and 2 type A ports are given, charging is very quick and easy to use.

It's so nice it also support super fast charging in SAMSUNG and all buttons are appropriate and all functions are usableThe size is niceEase of usageValue completely worths

I purchased the Xiaomi Power Bank 4i (20000mAh, 33W Super Fast Charging) expecting high-speed charging and good portability, but my experience has been a bit mixed.Pros:Large Battery Capacity – With 20000mAh, it can charge multiple devices before needing a recharge.Decent Build Quality – Feels solid and well-constructed.Multiple Ports – Supports charging for different devices at the same time.Charging Speed Feels Lower Than 33W – It does not seem to deliver full 33W charging; in real use, it feels closer to 25W.Heavy & Bulky – The power bank is quite heavy, making it less convenient for travel or carrying around.Takes Time to Recharge – Due to the large capacity, it takes quite a long time to charge the power bank itself.The Xiaomi Power Bank 4i is a good high-capacity power bank but doesn’t seem to deliver the claimed 33W charging speed. Also, its weight makes it less portable. If you need a reliable power backup and don’t mind the bulk, it’s fine. Otherwise, you might want to explore lighter and more efficient options