Published 2024. Product line-up and specifications have since changed — see the further reading below for current models.

How to choose a power bank: four things that matter

iWALK released two power banks in 2024, both built around being light, easy to carry and simple to use.

Purple iWALK plug-in power bank held in hand, 2024 buying guide

1. Safety certification and protection circuits

Before anything else, check whether the power bank carries BSMI certification from Taiwan's Bureau of Standards, Metrology and Inspection. That mark is the first test of whether a product is legal and safe. All iWALK power banks are BSMI certified — certificate number R55885.

2. Built-in cables or a plug-in design

Most newer power banks include a cable, so you do not have to carry a separate one. Choosing a model with a built-in cable or a plug-in design means one fewer thing in the bag, and a tidier bag at that.

3. How many charges? Read the rated capacity

Every power bank states its battery capacity. But there are two numbers: battery capacity is the total the cells hold, while rated capacity is what actually reaches your phone after conversion losses. Most are around 60% efficient, so rated capacity is the figure to judge by. It is usually given in mAh or Wh.

4. Output power

Common ratings are 5V/1A and 5V/2A, giving a maximum of 5W and 10W — enough for ordinary charging. At 9V/2A or 12V/1.5A the maximum reaches 18W, which is noticeably quicker.

Check that your own phone supports fast charging too. A fast power bank cannot help if the phone will not draw the power.

The 2024 iWALK models

iWALK 5th Gen PRO plug-in power bank

Pale blue iWALK portable charger with a round button and a connector on top
  • 99g — light enough to forget
  • Fast charging supported
  • LCD display showing the remaining charge
  • Extended connector, so it works with a phone case on
  • 4800mAh, enough to bring a phone back from empty

Suits: anyone who wants something to carry everywhere, with fast charging.

iWALK Squid 9000mAh power bank with built-in cables

Pink iWALK power bank with three white cables: Lightning, USB-C and USB-A
  • 198g — substantial without being heavy
  • 18W two-way fast charging
  • Built-in Lightning, USB-C and Micro-USB cables
  • LCD display showing the remaining charge
  • Trickle charging, so low-draw devices like watches and earbuds are safe
  • 9000mAh for a full day and then some

Suits: heavy phone users who need capacity and carry several devices with different connectors.

Further reading and related products