Energizer PD18W 20000mAh Portable Power Bank UE20003 review
Test score
Key features
- Large power bank
- 20000mAh
verdict: Power banks don’t get much better
This large-capacity power bank can charge two devices at once. Like other models this size, it’s bulky, but other than that it’s a great product: fast, efficient, simple to operate and a Which? Best Buy.
- Can charge two devices at once
- Fast
- Efficient
- Capacity as large as that claimed
- Power Delivery fast-charging feature
- No ‘pass-through charging’
INIU Power Bank 20W PD3.0 QC4.0 Fast Charging 20000mAh Portable Charger review
Test score
Key features
- Large power bank
- 20000mAh
verdict: A standout large power bank
We weren’t expecting much from this power bank from little-known brand INUI, but it thoroughly impressed us. It’s among the best power banks we’ve tested to date and it’s on the cheaper end of the spectrum, too. If you need a large power bank, this is one to consider.
- Close to claimed capacity
- Charges quickly
- Speedy when charging other devices.
- No pass-through charging
Juice 20000mAh Portable Power Bank Max review
Test score
Key features
- Large power bank
- 20000mAh
verdict: Best Buy excellence
This is an excellent high-capacity power bank that swept the board in our tests. Yes, it’s a large power bank, but it’s still smaller and lighter than many in this category. It’s a Which? Best Buy.
- Fast
- Efficient
- Multiple port types
- No ‘pass through charging’
Duracell 20100mAh Fast Charge Portable Power Bank review
Test score
Key features
- Large power bank
- 20100mAh
verdict: One of the best
The Duracell 20100mAh Fast Charge Portable Power Bank lives up to its claims and is an excellent product. Its triple USB ports give it the ability to simultaneously charge multiple devices and the ‘pass-through charging’ feature is nice to see. It’s a Which? Best Buy.
- Very fast
- Can charge multiple devices at once
- ‘Pass-through’ charging
- On the pricey side
Duracell 6700mAh Fast Charge Portable Power Bank review
Test score
Key features
- Small power bank
- 6700mAh
verdict: Great Best Buy power bank
The Duracell 6700mAh Fast Charge Portable Power Bank is an excellent device. It has a decent capacity, can swiftly charge up to two devices at once, features pass-through charging and it’s still pretty portable. It’s a Which? Best Buy.
- Fast
- Can charge two devices at once
- Pass-through charging
- Minimal instructions
Duracell 10500mAh Fast Charge Portable Power Bank review
Test score
Key features
- Medium power bank
- 10050mAh
verdict: Excellent power bank with a decent capacity
This is an excellent power bank. Its larger capacity gives you additional flexibility and it can swiftly charge up to two devices at once. Yes, it’s not as portable as some smaller models, but it’s still a Which? Best Buy.
- Slightly higher than average capacity
- Quite fast
- Pass-through charging
- On the bulky side
Xiaomi Mi 20000mAh Redmi 18W Fast Charge Power Bank review
Test score
Key features
- Large power bank
- 20000mAh
verdict: Best Buy triumph
This is a top-notch power bank with large capacity that we find hard to fault. It operates quickly and efficiently, and is a Which? Best Buy.
- Fast
- Efficient
- Multiple input types
- Heavy
- No pass-through charging
John Lewis 15K, 3-Port, Portable Power Bank review
Test score
Key features
- Large power bank
- 15000mAh
verdict: A nice balance of capacity and size
At 15,000mAh, This Best Buy power bank straddles the space between most medium and large power banks. It’s an excellent compromise between capacity, speed and efficiency, so if you’re looking for a power bank with enough juice to charge multiple devices without weighing you down too much, it’s a great choice.
- Very fast at charging other devices
- Quick to charge power bank
- Fairly efficient
- Lower capacity than many large power banks
- No pass-through charging.
Samsung 10,000mAh Battery Pack Silver review
Test score
Key features
- Medium power bank
- 10000mAh
verdict: An excellent medium power bank
This is among the best medium power banks we’ve tested and a clear Best Buy. It lives up to its claimed capacity and has both USB-A and USB-C outputs. What really propels it into the top tier though, is speed. Whether you’re charging the power bank or topping up your devices, this model runs rings around most others we’ve tested.
- Very quick to charge power bank
- Speedy at charging devices
- USB-A and USB-C outputs
- On the pricey side for a medium power bank
Belkin Boost Charge USB-C PD Power Bank 10K review
Test score
Key features
- Medium power bank
- 10000mAh
verdict: One of the best
We were very impressed by this model that can charge two devices at once. It’s not as portable as some, but it barely put a foot wrong in our tests and is a Best Buy.
- Fast
- Close to claimed capacity
- Can charge two devices at once
- Power Delivery fast-charging feature
- Bulky
- Efficiency could be better
Cygnett ChargeUp Reserve 20000mAh 18W Power Bank review
Test score
Key features
- Large power bank
- 20000mAh
verdict: Bulky, but very good
This power bank from Cygnett overstates the number of times it can charge your smartphone, but it’s still an excellent Best Buy power bank that did well in our tests.
- Can charge two devices at once
- Actual capacity very close to that claimed
- Efficient
- Power Delivery fast-charging feature
- No ‘pass-through charging’
- Manufacturer overstates the number of times you can charge your mobile phone
Juice 1 + Power Bank 4000mAh review
Test score
Key features
- Small power bank
- 4000mAh
verdict: A handy little power bank
This power bank is smaller than most, but it packs a punch for its size. It’s easy to use, fairly fast and lives up to its claimed capacity. If you just need enough power to keep your phone alive for a day while you’re on the go, this is a solid choice.
- Exceeds claimed capacity
- Easy to use
- Fits in a pocket
- Not the most efficient
- USB-C port is input only
Mophie Powerstation PD 6700mAh review
Test score
Key features
- Small power bank
- 6700mAh
verdict: Quick at charging devices
This Best Buy power bank from Mophie has a claimed capacity of 6,700mAh – on the beefy side for a small power bank. It’s well suited to keeping your phone charged for a day or an overnight trip, but it might struggle to keep more power-hungry tablets or games consoles going for long.
- Fast at charging devices
- Pass-through charging
- Failed to deliver claimed capacity
- Power bank is slow to charge
Mophie Powerstation 5000mAh (fabric) review
Test score
Key features
- Small power bank
- 5000mAh
verdict: Best Buy with some extras
The Mophie Powerstation 5000mAh (Fabric) is an excellent power bank. Its two USB ports give it the ability to charge up to two devices at once, and its ‘pass through charging’ is a handy extra feature. It’s a worthy Which? Best Buy.
- Can charge two devices at once
- Stylish
- Pass-through charging
- Not the swiftest small power bank we’ve tested
Belkin Boost Charge USB-C PD Power Bank 20K review
Test score
Key features
- Large power bank
- 20000mAh
verdict: An excellent choice
We were impressed by this portable power bank. It has plenty of capacity, is fast and efficient. If you’re OK with its bulky dimensions, it’s a Best Buy that’s worth a serious look.
- Quick
- Can charge two devices at once
- Power Delivery fast charging feature
- Heavy and bulky
- No ‘pass-through’ charging
Anker PowerCore Essential 20000 review
Test score
Key features
- Large power bank
- 20000mAh
verdict: A good choice
This is an excellent, fast and efficient power bank. Its large capacity means it’s bulky, but if you can live with that, it’s a good pick, and Anker’s first Best Buy.
- Large capacity
- Can charge multiple devices at once
- Built-in torch
- Bulkier and heavier than some
- No ‘pass-through charging’ feature
Belkin Boost Charge 3-Port Power Bank 10K review
Test scoreS
Key features
- Medium power bank
- 10000mAh
verdict: A solid all-rounder
There’s nothing especially noteworthy about this medium-sized power bank, but that’s not necessarily a problem. It’s a well-balanced model, doing everything it needs to well without any obvious dealbreakers.
- Fast to charge
- Relatively efficient
- No pass-through charging
John Lewis 10K, 2-Port, Portable Power Bank review
Test score
Key features
- Medium power bank
- 10000mAh
verdict: Simple, but fast
This medium power bank isn’t the very fastest or most efficient we’ve tested, but it’s still a tempting choice, especially given the price. If we’re being picky, the sockets could be better labelled but, overall, it’s not a bad choice.
- Fast when recharging power bank
- Quick to power other devices
- Supports Power Delivery
- Sockets not clearly labelled
Energizer Ultimate 10000mAh Portable Power Bank Black review
Test score
Key features
- Medium power bank
- 10000mAh
verdict: Lightning-fast power
This is the more expensive of Energizer’s flagship medium power banks, with the other being the Energizer Max. It’s easy to see why it costs more though – it outperforms its sister product in almost every one of our rigorous tests, making it a Best Buy.
- Very fast
- Plenty of input/output options
- Heavier than average
Juice 2 5000mAh Black review
Test score
Key features
- Small power bank
- 5000mAh
verdict: Plenty of juice in a small box
The Juice 2 impressed us with its combination of power and portability. It might not be up to charging high-capacity gadgets, but if you’re looking for a quick top up on the go, this is the power bank for you.
- A good balance of size and power
- Two output ports
- Supports pass through charging
- Output sockets are quite close together
