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The best power banks in 2024 as tested by our experts
Don’t get stuck without a charger – we’ve tested and selected the best power banks for keeping your devices juiced up on the go
Best AA batteries 2024: Tried and tested options to keep your devices going longer
We’ve tested everything from long-lasting lithiums to low-cost alkalines to bring you the best AA batteries for stamina and performance
Refurbished iPhones 2024: How to buy a tried and tested secondhand iPhone
After extensive testing, these are our top tips for making sure you don’t get ripped off when purchasing a used iPhone

Latest Technology

Acer Chromebook 15 review - hands on
Chromebooks

We put the first 15in Chromebook through its paces here at CES 2015

Published :
Acer Liquid Jade S brings octa-core CPU power to Europe
Mobile phones

Acer's latest Liquid Jade flagship smartphone joined by entry-level 4G Liquid Z410 handset at CES

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Acer H7550ST projector revealed with Chromecast internals
Projectors

Acer says the H7550ST is the world's first to arrive with built-in support for Google's Chromecast dongle

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Enter Sumif function into Excel
How to use the Excel Sumif formula
Software

Adding up the value of spreadsheet cells based on whether they match criteria using Sumif can really help you stay organised

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Cherry MW 2100
Mice

Pretty, compact mouse, but its wireless range isn't the best

Published :
£10 inc VAT
Archos 50 Diamond smartphone and Helium 4G tablets revealed
Mobile phones Tablets

Archos officially reveals its first 2015 smartphone and tablets ahead of CES

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Asus ZenFone with optical zoom camera expected for CES
Mobile phones

YouTube tease points to optical zoom camera tech for the latest Asus smartphone, with a CES reveal just days away

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Enter Countif function in Excel
How to use the Excel Countif formula
Software

Want to know how many records of a certain type you have in an Excel spreadsheet? You need Countif

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Enter data with Validation turned on
How to use Excel data validation
Software

Keeping an Excel spreadsheet with consistent values is easy thanks to Excel’s data validation feature

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Transcend ESD400K review
SSDs

A compact and good-value SSD, but we’re disappointed with its small-file transfer speeds

Published :
£206 inc VAT