Rank #3 in Best 20000mAh Power Bank: 10 Ranked by Real Charge Counts
UGREEN Nexode 45W 20,000mAh Power Bank
Price and rating as shown on Amazon when we collected them. Both change.
The UGREEN Nexode 45W 20000mAh Power Bank is the third pick in this guide. It is a 20,000mAh pack with a USB-C cable built into the body, three ways to charge at once (the built-in cable, a USB-C port and a USB-A port) and an LED screen showing what is left in the tank. It is listed at £23.98 with 4.4 stars from 4,379 ratings.
On the question this guide keeps coming back to — what a 20,000mAh claim actually delivers — UGREEN puts itself mid-table: 3 full charges for a Galaxy S25 Ultra, or 4.2 for an iPhone 16. That sits below the 7 iPhone 17 charges Riapow claims and above the 3.4 iPhone 16 charges Baseus claims. Its weight field says 468 g, which is heavier than the 425 g that is the highest battery weight quoted anywhere else in this guide — and the same listing also lists "lightweight" among its special features. Everything on this page comes from the Amazon listing, not from testing by us.
How those 4,379 ratings break down
An average hides its own shape. This is the spread behind the 4.4 stars.
Specification
Exactly as published on the Amazon listing, field for field.
| Price | £23.98 |
|---|---|
| Rating | 4.4 out of 5 from 4,379 ratings |
| Stated capacity | 20,000mAh |
| Claimed charges | 3 full charges for a Galaxy S25 Ultra, 4.2 for an iPhone 16 |
| Maximum output | 45W (45W input as well) |
| Item weight (as listed) | 468 g |
| Dimensions (as listed) | 15.2 x 7.1 x 2.9 cm |
| Special features (as listed) | Built-in cable, fast charging, lightweight |
What buyers actually say
Quoted from customer reviews on Amazon
Verified purchase“Bought this for a long drive to France to keep the kids happy. Charges quite quickly and the 20,000 mah kept my kids devices charged during a long and being drive. Since returning I always keep this charged and in the drawer and it's surprising how many times we've used it. It will charge a phone around 4 times before needing a recharge. Have used with several devices at once and all charged quickly. It is a chunky boy, and quite weighty but in a car or in a bag that doesn't matter. The built in digital battery remaining % is handy, as is the built in usb cable that doubles as a carry handle. Definitely worth the money.”
Verified purchase“It holds charge pretty well and it charges quite fast, the pack itself is pretty much the size of a phone, however almost triple the thickness, but for this capacity it's no surprise. It also has a digital indicator, which is great, and a built in USB-C cable. The design is also quite slick, and it feels durable. I bought it for work where I use my phone for hours constantly on the road, and I'd recommend buying it.”
What it is up against
The rivals it was ranked against in Best 20000mAh Power Bank: 10 Ranked by Real Charge Counts.
Questions people ask
How many times can the UGREEN Nexode 45W charge a phone?
The listing claims 3 full charges for a Galaxy S25 Ultra or 4.2 charges for an iPhone 16.
How heavy is the UGREEN Nexode PB536?
The item weight field says 468 g, while the special features field in the same listing lists "lightweight". Both figures sit in the same Amazon entry.
How fast does it charge?
UGREEN claims 45W output, enough to take a Galaxy S25 Ultra to 61% in 30 minutes with Super Fast Charging 2.0, and the same 45W on input to refill the pack.
Can the UGREEN Nexode charge three devices at once?
Yes. The listing describes a built-in USB-C cable, a USB-C port and a USB-A port, with an LED screen showing the remaining battery level.
Do I need to bring a cable?
The USB-C cable is built into the NGREEN unit and doubles as a lanyard for a bag, so it handles both charging out and recharging in.
What do the voltage and amperage figures mean?
The spec block lists 7.4 volts and 3 amps alongside a 45W maximum output claim. The listing does not explain how those two sets of numbers relate to each other.
Comments
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