• Which? survey found most laptops last for fewer hours than claimed
  • HP and Dell laptops offer less than half the battery life that they advertise 
  • Apple Macbook came out on top and exceeded its claimed 10-hour battery life 

Daisy Dunne For Mailonline

Many of the world’s most popular laptops offer almost half the battery life promised by their manufacturers, new research has revealed.

A Which? survey found most computer companies wildly exaggerate how long laptop batteries can last for.

Researchers concluded that HP and Dell were the worst offenders, after their laptops lasted nearly half the time claimed by the manufacturers in a test.

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Many of the world's most popular laptops offer almost half the battery life promised by their manufacturers. Pictured is the claimed battery life and average time  lasted in a Which? test of seven major laptop brands

Many of the world's most popular laptops offer almost half the battery life promised by their manufacturers. Pictured is the claimed battery life and average time  lasted in a Which? test of seven major laptop brands

Many of the world’s most popular laptops offer almost half the battery life promised by their manufacturers. Pictured is the claimed battery life and average time lasted in a Which? test of seven major laptop brands

THE WORST PERFORMERS 

1. HP: Claimed: nine hours 48 minutes

Average tested life: five hours two minutes

2. Dell: Claimed: nine hours 15 minutes

Average tested life: five hours 12 minutes

3. Toshiba: Claimed: seven hours 58 minutes

Average tested life: four hours 45 minutes

4. Asus: Claimed: 10 hours 12 minutes

Average tested life: six hours 53 minutes

5. Lenovo: Claimed: six hours and 41 minutes

Average tested life: four hours and 34 minutes

6. Acer: Claimed: seven hours 53 minutes

Average: five hours and 59 minutes 

 7. Apple: Claimed: 10 hours

Average: 10 hours and 15 minutes 

But Apple came out on top and exceeded its claimed battery life of ten hours.

The consumer group tested 67 models and found that six out of seven brands overstated the battery life of their laptops.

In a test, HP models lasted an average of five hours and two minutes, against the nine hours and 48 minutes claimed by the company.

The HP Pavilion 14-a1115na laptop can last just four hours and 25 minutes compared to the claimed nine hours.

And Dell laptops last just five hours and 12 minutes of the promised nine hours and five minutes.

Jack Turner, from Which?, said: ‘Overall we found that manufacturers are missing their claims not by minutes, but by hours.

‘The most optimistic laptop manufacturers are overstating their battery life by 50 per cent or more, leaving you searching for the power cable twice as often as you’d expect. 

Which? tested how long the laptops lasted while browsing the web over wi-fi. 

‘Each laptop we judge goes through our battery tests at least three times,’ Mr Turner said.

In a test, HP models lasted an average of five hours and two minutes, against the nine hours and 48 minutes claimed by the company. Pictured is a HP  Pavilion 15-n230us Notebook

In a test, HP models lasted an average of five hours and two minutes, against the nine hours and 48 minutes claimed by the company. Pictured is a HP  Pavilion 15-n230us Notebook

In a test, HP models lasted an average of five hours and two minutes, against the nine hours and 48 minutes claimed by the company. Pictured is a HP  Pavilion 15-n230us Notebook

Apple came out on top and exceeded its claimed battery life of ten hours. Pictured is an Apple MacBook with OS X Yosemite on the display

Apple came out on top and exceeded its claimed battery life of ten hours. Pictured is an Apple MacBook with OS X Yosemite on the display

Apple came out on top and exceeded its claimed battery life of ten hours. Pictured is an Apple MacBook with OS X Yosemite on the display

‘We don’t simply trust battery capacity claims: we actually drain the whole battery from start to finish, several times over, during various tasks. 

‘One test involves watching films until the battery finally shuts down, another continually browsing websites over wi-fi.’

In response to the research, Dell told Which?: ‘It’s difficult to give a specific battery life expectation that will directly correlate to all customer usage behaviours because every individual uses their PC differently – it’s similar to how different people driving the same car will get different gas mileage depending on how they drive.’ 

HP said that is battery tests ‘uses real life scripts and runs on real applications like Microsoft office‘, and that personalised specifications, such as screen resolution, will change the battery power for each model.

Asus claimed their computers last for 10 hours 12 minutes on one charge. But Which? found the average battery life is actually six hours and 53 minutes

Asus claimed their computers last for 10 hours 12 minutes on one charge. But Which? found the average battery life is actually six hours and 53 minutes

Asus claimed their computers last for 10 hours 12 minutes on one charge. But Which? found the average battery life is actually six hours and 53 minutes

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