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The smartphones with the longest battery life 

Stay connected all day with these phones. Plus, we reveal the quickest-charging phones from a range of brands.

mobile phone with battery charge icon
Last updated: 20 April 2021

Need to know

  • Our experts tested more than 100 smartphones to assess their battery life
  • You may want to consider a mobile power bank for your phone once its battery performance has declined
  • Quick-charge technology can give you several extra hours of use from just a 15-minute charge

Lost without your smartphone? A dying phone battery can be all sorts of stressful, especially if you're counting on it to stay connected. 

But it's not just about needing to check your Twitter feed or Instagram likes. If you're hotspotting on the fly for work, in an emergency situation or in an area where power supply is sketchy, you'll want to be sure your phone's battery won't let you down. 

Our expert testers put more than 100 smartphones through their paces to give you accurate information about battery life, as well as factors such as durability and GPS performance – important when you're cut off from the world but need to stay connected. 

Here are the models we've tested that have the most juice.

Smartphones with the longest battery life

These are the phones that scored best for battery life in our lab tests:

Phone Battery life score (%)
Realme 7 Pro (128GB) 94
Realme 6 (128GB) 92
Realme 7 (5G, 128GB) 92
Samsung Galaxy A71 91
Samsung Galaxy A71 (5G)  89
Oppo A52 (64GB) 88
realme 7 pro 128gb

The Realme 7 Pro (128 GB) topped our test for battery life. It offers 21 hours' operational time after a 15-minute charge.

Quick-charge champions

Why is it that you only realise your phone is about to run out of battery just as you're leaving the house? A mobile power bank is a good option in these situations. But if you don't have one, quick-charging technology could save you. 

"This is where the phone is able to take a big hit of energy to increase the battery capacity in less time than usual," says Denis Gallagher, CHOICE smartphone expert. 

"Some phones can give you several hours of use from just a 15-minute charge before you dash out the door. 

"The lesson here is: check out your existing phone to see if it supports quick charging. And you could give it a new lease of life by buying a quick charger for those times when you need to charge in a hurry."

The phones with the longest operational time after a 15-minute charge:

Phone Operational time after 15-min charge
Realme 7 Pro (128GB)  21 hours
Realme 7 (5G, 128GB) 12 hours
Oppo Reno4 (5G) 16 hours
Realme 6 (128GB) 12 hours
OnePlus 8T (5G, 256GB) 11 hours
Oneplus 8 (256GB) 11 hours
Oppo A52 (64GB) 11 hours
Huawei P40 Pro Plus 5G 10 hours
OnePlusNord (256GB) 10 hours
Huawei Mate Xs (5G) 10 hours
Motorola Moto G9 Plus 10 hours

Do I need a power bank for my mobile phone?

"Most people own their mobile for two to three years before upgrading and you can expect your battery to last without incident over this time," says Denis.

"However, the battery performance (how long it lasts before a recharge) will worsen after a year or so of use. 

"If you like your mobile and don't want to get the latest and greatest model, you may want to consider a power bank for those occasional days of heavy use."

How we test mobile phones

Our experts conduct rigorous tests on each mobile phone in our dedicated test facilities. Testers rate aspects of each phone, including:

  • Durability: We simulate falls from a table or shirt pocket up to 25 times; store the phones in hot, damp conditions; and carry out a rain test. 
  • GPS: We measure for accuracy and speed.
  • Battery life: We record the time-in-use results in hours, and standby times in days.

Want to know more? Here's the lowdown on how we test smartphones.

We care about accuracy. See something that's not quite right in this article? Let us know or read more about fact-checking at CHOICE.