Best power banks: Reviews & buying advice

Modern smartphones come equipped with huge screens with high resolutions, a myriad of apps and powerful processor, but heavy use all those features rapidly drains the battery.

With heavy use you're lucky if your phone will last a day on a single charge, which can leave you with a dead device when you least need it. Power banks offer a solution.

Our top picks are:

  1. Anker PowerCore 20100
  2. RavPower PowerStation Series 20100mAh
  3. Aukey PB-N36

Read on for the full list.

Read next: Best smartphones for entrepreneurs 2017

Anker PowerCore 20100
© Anker

Anker PowerCore 20100

Anker produces a wide range of portable chargers of various shapes and capacities. The Powercore 20100 is perhaps the best.

It weighs just over 350 grams but has the power for seven charges of the iPhone 7, five of the Galaxy S6 or two of the iPad mini 4. It can be recharged in 10 hours with a two amp charger, or up to 20 hours with phone chargers, which are generally one amp.

Capacity:20,100 mAh

Price:£29.99 from Amazon

RavPower PowerStation Series 20100mAh
© RavPower

RavPower PowerStation Series 20100mAh

The RavPower PowerStation Series 20100mAh is a powerful product with a hefty price tag. The built-in AC output for devices up to 65W is designed to recharge a variety of electronic devices, including GoPros, drones, printers and, vacuum cleaners anywhere.

It can provide seven charges of the iPhone 7, four-and-a-half of the Galaxy S7 and provides full power in only four hours. The Type-C and iSmart USB allows you to charge two devices simultaneously

Capacity:20,100 mAh

Price:£117.99 from Amazon

Aukey PB-N36
© Aukey

Aukey PB-N36

The Aukey PB-N36 automatically supplies a device with its maximum safe charge rate by using AiPower Adaptive Charging to detect every device that is connected to it to deliver the fastest possible charge.

It can charge an iPhone 7 Plus four-and-a-half times, and a 9.i-inch iPad Pro 1.5 times. It can also simultaneously charge multiple devices.

Capacity:20,100 mAh

Price:£19.99 from Amazon

CHJD UltraCompact

CHJD UltraCompact

The CHJD UltraCompact is best known for its minuscule size, as its name suggests. The company advertises it as the world’s smallest 10,000 mAh power bank, with measurements of 93 mm x 63 mm x 19 mm.

It uses Ai Power Technology to deliver the fastest possible charge for any connected device and can charge an iPhone 6 four times, a Galaxy S5 2.6 times and a Galaxy Note 2.4 times. It can also simultaneously charge multiple devices.

Capacity:10,000 mAh

Price:£34.99 from Amazon

Anker PowerCore+ mini
© Anker

Anker PowerCore+ mini

Anker's second entry on our list is another excellent compact option. The lipstick-sized PowerCore+ mini uses PowerIQ amp-adjustment technology to give each device the fastest possible charge.

It can fully charge an iPhone 6 more than once and a Galaxy S6 almost once. The PowerCore+ mini itself can be recharged in three-four hours with a one amp adapter.

Capacity:10,000 mAh

Price:£10.99-£12.99 from Amazon

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