Skip to content   Skip to footer navigation 
What's behind
the score?
Watch the video
Last updated: 22 February 2017

The battery life of your smartphone is under a lot of extra strain from apps, social media, music streaming and online video. A power bank is a rechargeable, portable charger that can keep your phone going throughout the day. Our buying guide explains what to look for, and how we test power banks explains how we get our results.

Read more

We test 18 power banks designed to keep even the most power-hungry smartphones kicking day and night. Our detailed test reveals:

  • the number of times they can charge your phone before they need charging
  • approximate charge time
  • approximate portable battery recharge time
  • size, weight and which models can fit in your pocket.

Our interactive comparison table shows the number of devices each power bank can simultaneously charge, included USB cord length, as well as useful features and functions such as auto on/off settings and inbuilt torches. 

Show less


Narrow your results

Your filters

Clear all filters


Expand to view more details.

List of brands we tested in this review.


Expand to view more details.

Recommended retail at time of purchase.

enter value/s in increments of 1 between 25 and 169

Top filters

Recommended products

Weight (g)

Expand to view more details.

Weight of each power bank was recorded without any cables or packaging.

enter value/s in increments of 1 between 188 and 1018

Test results

Display score

Expand to view more details.

Takes into account the position of the display on the unit (40%) and how easy it is to see and understand at a glance (60%).

enter value/s in increments of 1 between 54 and 98

Performance score

Expand to view more details.

Based on a charging score that comprises how many times our test phone could be charged (60%) and the discrepancy between theoretical and actual charges (40%), and how long it took the power bank (on average) to charge our phone (50%).

enter value/s in increments of 1 between 44 and 79


Cord length (mm)

Expand to view more details.

The length of the supplied USB cable, as measured, not taking into account the plugs.

enter value/s in increments of 1 between 100 and 740

Number of charging outputs

Expand to view more details.

Number of USB output ports are present for charging devices.

Charge indicator

Expand to view more details.

Refers to the type of display present on the power bank.



Expand to view more details.

Whether or not there is a built in LED light.

Included in this review

Members-only access
  • Recommended
  • Overall score
  • Performance score
  • Ease of use score
  • Display score
  • Pocketability score
  • Average time to charge a phone (hh:mm)
  • Average number of times phone could be charged
  • Average speed of charge (tested, mA)
  • Power bank charge time (hh:mm)
  • Fastest charging 5V USB port (amps)
  • Slowest charging 5V USB port (amps)
  • Maximum combined output (amps)
  • Good points
  • Bad points
  • Brand
  • Model
  • Price
  • Stated capacity (mAh)
  • Battery type
  • Weight (g)
  • Size (mm, H x D x W)
  • Output voltage
  • Number of charging outputs
  • Quick charge output
  • Other ports
  • Cord length (mm)
  • Torch
  • Auto switch-on
  • Auto switch-off
  • Over-charge protection
  • Charge indicator
  • Can charge a Windows tablet
  • Other features
Show all
Compare all products All the details,
side by side


Back to filters

Product selected for a detailed comparison

Clear all