The Fine Print

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Portable Power Banks

What reviewers actually report about capacity, charging speed and what goes wrong.

Nothing here was tested in a lab. Every line below is a synthesis of what verified buyers report in their own reviews, including the complaints, which is the part most roundups leave out.

ProductCapacityRatingThe catch
10000mAh 22.5W Portable Charger Power Bank...10,000 mAh4.5 (296)Another reviewer said it stopped charging anything after about two months of use.
Portable Charger with Built-In Cables10,000 mAh4.4 (384)One reviewer said the power output was too weak to charge their modern USB-C iPad, and the bank shut down before finishing...
MOKiN 10000mAh 30W Portable Charger10,000 mAh4.4 (211)One reviewer said their unit stopped charging properly after just a day of use.
JOYROOM Portable Keychain Charger for Apple Watch5,000 mAh4.4 (41)Nothing consistent in the reviews.
50000mAh Power Bank50,000 mAh4.3 (105)Several reviewers say charging speed is slow, and the unit itself is noticeably bigger and heavier than a typical power bank.
MagSafe Portable Charger10,000 mAh4.3 (94)One reviewer says their unit was already coming apart right out of the box.
SolidSafe BMX Air Slim Magnetic Power Bank 5000mAh5,000 mAh4.3 (58)A few reviewers say wireless charging speed comes in below the advertised spec on certain phones.
Ntaanoo MagSafe Power Bank iPhone, Magnetic Portable...10,000 mAh4.2 (1,326)It only works with MagSafe-compatible cases, so you'll need to remove thicker cases first.
ULiXWH Ultra-Slim 5000mAh Magnetic Wireless Power Bank...5,000 mAh4.2 (36)A few reviewers said it gets noticeably warm while charging their phone.
GEWAKU Detachable Wall Plug Portable Charger 15000mAh...15,000 mAh4.1 (51)Some reviewers reported it feels bulky, and one said their unit's battery began to swell over time.
MagSafe Power Bank with Wall Plug10,000 mAh4.0 (144)Some reviewers say the magnetic wireless charging doesn't always work, and getting a return handled was a hassle.

All 11, in detail

10000mAh 22.5W Portable Charger Power Bank with Built-in 3 Cables & AC Wall Plug

000mAh power bank Reviewers say the built-in cables and wall plug make it a genuine grab-and-go travel charger.

The catch. Another reviewer said it stopped charging anything after about two months of use.

See it on Amazon

Portable Charger with Built-In Cables

Reviewers say the built-in cables mean they never have to pack extra cords, and the LED display makes checking battery level effortless.

The catch. One reviewer said the power output was too weak to charge their modern USB-C iPad, and the bank shut down before finishing the job.

See it on Amazon

MOKiN 10000mAh 30W Portable Charger

Reviewers say it charges phones quickly and holds enough charge for multiple top-ups.

The catch. One reviewer said their unit stopped charging properly after just a day of use.

See it on Amazon

JOYROOM Portable Keychain Charger for Apple Watch

It charges a phone, Apple Watch, and earbuds all from the same compact charger.

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50000mAh Power Bank

Reviewers say the built-in cables make it easy to charge several devices without carrying extra cords.

The catch. Several reviewers say charging speed is slow, and the unit itself is noticeably bigger and heavier than a typical power bank.

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MagSafe Portable Charger

Reviewers say the built-in USB-C cable means one less cord to carry, with 20-watt wired charging on top of magnetic wireless.

The catch. One reviewer says their unit was already coming apart right out of the box.

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SolidSafe BMX Air Slim Magnetic Power Bank 5000mAh

Reviewers are surprised by just how thin and pocket-friendly it is compared to other magnetic power banks.

The catch. A few reviewers say wireless charging speed comes in below the advertised spec on certain phones.

See it on Amazon

Ntaanoo MagSafe Power Bank iPhone, Magnetic Portable Charger 10000mAh

Reviewers say the magnetic snap-on connection is strong and stays attached even during everyday movement.

The catch. It only works with MagSafe-compatible cases, so you'll need to remove thicker cases first.

See it on Amazon

ULiXWH Ultra-Slim 5000mAh Magnetic Wireless Power Bank for iPhone

Reviewers say it's thin enough to disappear in a pocket, about the size of a couple of credit cards stacked together.

The catch. A few reviewers said it gets noticeably warm while charging their phone.

See it on Amazon

GEWAKU Detachable Wall Plug Portable Charger 15000mAh Power Bank

000mAh power bank Reviewers say the detachable wall plug design means one device covers both a power bank and a wall charger.

The catch. Some reviewers reported it feels bulky, and one said their unit's battery began to swell over time.

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MagSafe Power Bank with Wall Plug

Reviewers say the built-in AC wall plug makes it easy to recharge without hunting for a separate cable.

The catch. Some reviewers say the magnetic wireless charging doesn't always work, and getting a return handled was a hassle.

See it on Amazon