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Best Smartphones for Battery Life in 2019

by Denise Timmis | Apr 12, 2019

Best Smartphones for Battery Life in 2019

What makes a good phone battery?


Whilst mobile phone manufacturers are continuously making breaking innovations with impressive technological advancements, it’s important to remember that a device’s battery is arguably the most important feature. Afterall, if your device is out of charge, you can’t use any of those features. So, what makes a good phone battery?


Most modern smartphones opt for lithium-ion battery cells due to their capacity to hold more energy than other battery types; they also self-discharge at a lower rate – meaning they run out of charge more slowly.


Batteries with a higher mAh rating usually make for a better phone battery too. mAh stands for Milli-Ampere Hour and refers to how much electric energy a battery can store, and how quickly it discharges. The higher the mAh of a battery, the more charge it can hold and the longer it can last, so bear this in mind when looking for a device you can rely on.


The performance of a battery is also aided by a device’s ability to optimise the power usage – many phones may have a battery with a high mAh rating, but this doesn’t always mean the battery will perform better. The software on a device should regulate the power usage of apps and processes in order to get the best out of a charge.


If you’re looking for a device that’ll keep you going all day (and maybe even longer) then check out our top 10 mobiles with the best battery life for a point in the right direction.


Top 10 mobiles with the best battery life  



10. Huawei Mate 20 Pro

Huawei Mate 20 Pro

  • 4,200mAh battery
  • Over a day of power


Huawei combine large battery capacity and AI battery optimisation on the Huawei Mate 20 Pro – meaning you’ll easily be able to get a full day of use out of this device, and then even more.


Whilst the battery itself is impressively sized, Huawei has also given the Mate 20 Pro excellent capabilities when it comes to tracking its own power usage and optimising processes to help the device stay charged for longer.


You’ve also got plenty of settings you can adjust if you’re looking to keep your phone on for as long as possible – downgrade your screen resolution, use a monochrome display and kill idle apps.


When it does come to charging time, you can expect to gain a remarkable 70% of charge in just half an hour thanks to Huawei’s 40W SuperCharge – but if you’re looking to go cordless, this device also supports Qi wireless charging, too. 


With all that power – it’d be rude not to share. The Mate 20 Pro can “reverse wireless charging”, meaning you can use its power to charge another device that also supports Qi wireless charging, just by putting them together.


9. Moto G6 Play

Moto G6 Play

  • 4,000mAh battery
  • 32 hours of power


Despite this device featuring a powerful, crisp and vibrant 18:9 LCD 5.7-inch screen, the Moto G6 Play still manages to last a full day – and then some.


You can expect this device to survive some real heavy use throughout the day and still maintain an impressive power level thanks to the 4,000mAh battery and the device’s ability to optimise its power usage. You’ll comfortably get through the day with this phone with plenty of power intensive tasks such as social media scrolling, streaming and even gaming, without reaching for the charger once.


If you’re looking for a phone that can last morning to night with some testing use, this is one to consider.


8. Moto E5 Plus

Moto E5 Plus

  • 5,000mAh battery
  • 1.5 days of power


Motorola are known for creating devices with a great battery life – and the E5 Plus is no exception.


Its 5,000mAh battery will deliver an impressive 1 and a half days of battery life including some heavy use – and even if you don’t get to a power source often, you won’t be waiting long for a power up thanks to TurboCharging. Just 15 minutes of charging will give you 6 hours of power.


Plus, you’ll have a great 12MP camera with laser focus, a fingerprint scanner and a crisp, clean 6-inch display, too.


7. CAT S41


  • 5,000mAh battery
  • 38 hours of talk time, 44 days on standby


This is an excellent choice for the clumsy among us, or those who work in an environment that’s trying on your typical smartphone devices.


As well as CAT's signature armoured and durable body, this device packs a punch when it comes to power. The 5,000mAh battery paired with a mid-range processor and lack of bloatware means you won’t be reaching for a charging cable at any time throughout the day.


CAT promises an impressive 38 hours of talk time, or 44 days of power on stand-by, meaning you can definitely expect a couple of days from this device. If you’re looking for a device that you can use to scroll through social media, watch videos, call and texting with and something that’s going to survive a few bumps all while lasting much longer than the average device, the CAT S41 is the one for you. 


6. Xiaomi Mi Max 3

Xiaomi Mi Max 3

  • 5,000 mAh battery
  • 17 hours of video playback, 10 hours of continuous gameplay, 233 hours of music playback or 474 hours of standby time


The Xiaomi Mi Max 3 is an amazing device – it’s got a dual lens camera, a huge 6.9-inch 18:9 display, and most importantly (at least for this guide!) a 5,500mAh battery.


One for tech lovers, this phone has a great Qualcomm SDM636 Snapdragon 636 chipset, an IPS LCD screen and impressive 12MP+5MP and 8MP cameras. It’s packed full of interesting features like the IR blaster, the multi-tasking split screen mode and full-screen gestures - plus it’s also got a classy, modern look. It’s not easy to keep a phone with all this running for a couple days without charging it back up, but the capacity of this battery and its optimisation software makes it possible.


Like most other phones in this list, the Mi Max 3 also supports fast charging, so when it comes to recharge, you’ll be impressed at how quickly this large cell regains its power compared to how long it lasts.


5. OnePlus 6T

OnePlus 6T

  • 3,700mAh
  • Up to 2 days of power


Following in the footsteps of the OnePlus 6 – which earned the title of longest lasting device amongst many tech fans – this upgrade has some serious power. While this battery is huge, it’s not as massive as some of the other cells in this list – but it’s the OnePlus6T’s ability to optimise its power usage that really sets this device apart.


Whether you’re using your OnePlus 6T overnight, or you're running multiple power intensive tasks at once, this device can regulate its own power usage and optimise its processes so well it’ll be a difficult task to drain the battery quickly.


It also supports an impressive fast charging capability, so when the time finally comes to power up, you won’t be waiting long at all.


4. Cubot Power

Cubot Power

  • 6,000mAh battery
  • 6,000 hours of standby


The Cubot Power is a lesser known device, but this Android powerhouse sports an enormous 6,000mAh battery. Cubot promise that this device will provide you with a whopping 46 hours of talk time, 15 hours of streaming or a massive 50 hours of music playback.


This device has a great 5.99-inch screen and fast processor, and all of the features you’d expect from the modern=day smartphone, but with a much longer battery life.


3. Doogee BL9000

Doogee BL9000

  • 9,000mAh battery
  • 50 hours of talk time, 768 hours standby


This device has a 5.99-inch LG FHD+ display, a dual lens 12MP+5MP rear camera and an 8MP front-facing camera, Helio P23 processor with 6GB RAM and an enormous 9,000mAh battery.


The Doogee BL9000 is another device that’s not from a mainstream manufacturer, but definitely packs a punch. It delivers 768 hours of standby thanks to its immense battery capacity – you’ll comfortably last a couple of days without a charge on this phone.


But when you finally do need to plug in, you’ll be pleasantly surprised. You might think it’ll take ages to recharge such a large capacity cell, but the BL9000 uses 5V-5A low voltage high current transmission to completely charge from 0% to 100% in only 70 minutes.


2. Moto G7 Power

Moto G7 Power

  • 5,000mAh battery
  • 60 hours of power


The Moto G7 Power sports a large battery capacity – one that Motorola promises will provide over two days of power from a single charge. 


Alongside this huge 5,000mAh battery, this device uses battery optimisation within most processes – which you can increase if you’re trying to reserve even more power.


However, you probably won’t need to, as even when the time comes to charge, the G7 Power’s TurboCharging ability means you won’t be hanging around for this sizeable battery to regain its power. Turbocharging allows the device to charge from 0% to full in just over 2 hours, and Motorola even promise 9 hours of screen time from just 15 minutes of charging time.





  • 13,000mAh battery
  • 7 days of power


The Ulefone Power 5 really pushes the boundaries of smartphone batteries. The device’s impressive 13,000mAh cell promises to keep you switched on for a whole week.


The device uses low voltage charging to reach full capacity in just 2 and a half hours – which is especially impressive considering 5 minutes of charging provides 5 hours of talk time.


This phone doesn’t compromise power for functionality either – with 4 cameras, wireless charging, MT6763 Octa-core CPU and face/fingerprint scanners, this phone promises to give you it all – for longer.


Honourable mentions

You may find it surprising that many big names such as the Samsung Galaxy S10 or the iPhone X didn’t make the cut – but many of the phones on this list strive specifically to be powerful.


Many current flagships on the market do have an immensely impressive battery life, but they can’t quite keep up with the devices in this list. Whilst phone batteries on the market feature large 3,000 mAh-4,000 mAh cells, the rapidly improving processors and CPUs of the devices eat up some of that power.


However, most manufacturers are now developing increasingly complex AI technology that learns how owners use their devices and applies this knowledge when optimising battery usage. Due to this, mobiles are becoming increasingly long-lasting in terms of power, with most phones even now getting through the working day on a single charge.


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