Smartphone comparison best autonomy 2021: which model to buy?

Which smartphones offer the best autonomy in 2021? Today we propose to answer this question with our selection. We find of course high-end, but also old flagship whose price has fallen but still efficient in terms of autonomy and some models for small budgets. Battery with an above average capacity, optimization of processor or screen management, the smartphones we present to you are champions of autonomy.

Our selection of smartphones with the best battery life

android battery life

Two points have always been particularly emphasized on smartphones for the majority of users: the photo, and the autonomy. If the first point evolves enormously over the years, the second is now in need of a new battery technology. Either way, that doesn’t stop us from having devices that are struggling to stand out from the crowd with huge batteries or crazy software optimizations. If battery life is the most important point of a smartphone for you, here are the devices you should turn to.

Best premium premium smartphone

iPhone 12 Pro Max

iPhone 12 Pro Max

Like the iPhone 12 Pro, the iPhone 12 Pro Max experiences a drop in battery capacity compared to its predecessor (about 7% less). This new battery therefore offers a capacity of 3678 mAh exactly, against 3969 mAh for the iPhone 11 Pro Max. Considering the power of the A14 Bionic, which must be powered, and the presence of a 5G modem (the Snapdragon X55 to be precise), which is very demanding, we should obviously expect a drop in battery life.

According to Apple, the iPhone 12 Pro Max has the same battery life as the iPhone 11 Pro Max. Translate as 20 hours of video playback, 12 hours of video streaming, and 80 hours of audio playback (but not audio streaming, nuance). Official values ​​show that the 12 Pro Max offers an additional 1 hour of video streaming time compared to the 12 Pro.

The iPhone 12 Pro Max is available on Friday, November 13. The 128 GB version costs € 1,259. Apple is asking € 1379 for the 256 GB variant and € 1609 for the 512 GB model. Very high-end, it differs from the iPhone 12 Pro by its giant 6.7-inch screen. It inherits the same triple photo sensor with Lidar but on the other hand promises better autonomy. Finally, there is 5G and MagSafe compatibility.

The + The –
The best iPhone for photography The price
Decent autonomy
Fast charging not really fast
A very beautiful design and noble materials
The absence of a fast charger in the box
A great audio experience
Battery capacity declining

To see: the best deals to buy the iPhone 12/12 Pro at the cheapest price

Samsung Galaxy S21 Ultra

Samsung Galaxy S21 Ultra

The most high-end smartphone of the new S21 range is the Galaxy S21 Ultra. Bigger than the S21 and S21 +, the terminal sports a superb 6.8-inch diagonal AMOLED screen and benefits from WQHD + definition while the other two are content with Full HD +. Its battery is also larger since we are now on a capacity of 5000 mAh. Samsung has decided to offer the same fast charge on all of its models.

As a result, while the S20 Ultra benefited from a charging capacity of 45 W, that of the S21 Ultra drops to … only 25 W! Additionally, Samsung has decided not to include a charger in the box. To take advantage of the fast charge, it will therefore be necessary to bring the appropriate unit. Count around twenty euros for an official Samsung charger on online sales sites.

The + The –
Really excellent screen quality
No microSD slot
Video stabilization
Fast charging less efficient than that of the S20 Ultra
Audio quality
Battery management

To see: the best offers to buy the Samsung Galaxy S21 / S21 + / S21 Ultra at the cheapest price

Samsung Galaxy Note 20 Ultra


Equipped with a 4500 mAh battery, 500 less than the S20 Ultra, the Note 20 Ultra nevertheless offers a very good autonomy. The device properly supports fast charging. The charger included in the box allows the smartphone to be fully re-inflated in less than 1h10. The smartphone is compatible with the 5G network and is available in 3 colors: Mystic Bronze, Mystic White and Mystic Black. For an in-depth analysis, we invite you to read our test and opinion on the Galaxy Note 20 Ultra.

The + The –
Autonomy management
The protrusion of the rear photo sensors
Color balance due to scene optimizer enabled by default
Adaptive 120 Hz
The price
The quality of low-light photos

To see: the best offers to buy the Samsung Galaxy Note 20 and Note 20 Ultra at the cheapest price

Xiaomi Mi 10T / 10T Pro

Xiaomi Mi 10T 10T Pro

The Mi 10T and Mi 10T Pro both come with the powerful Qualcomm Snapdragon 865 processor and 6GB / 8GB of RAM as well as 128GB / 256GB of internal memory depending on the variant. The Mi 10T, just like the 10T Pro, has a 5000 mAh battery. It only takes 1h05 with the 33W charger provided for a full recharge.

The photo part is to the advantage of the Mi 10T Pro with the integration of a 108MP Samsung HMX module of 1 / 1.33 ″ against a 64MP Sony IMX682, 1 / 1.7 ″ sensor. Difference also in digital zoom: up to 30x for the Mi 10T Pro against 10x for the Mi 10T. The Mi 10T Pro allows slow motion shooting at a rate of 120 fps while the Mi 10T allows slow motion shooting at a rate of 240/960 fps.

For the rest, the smartphones are almost identical, same dimensions, 165.1 x 76.4 x 9.33 mm with a difference of 2 grams only 218 grams for the Mi 10T Pro and 216 grams for the Mi 10T.

The + The –
The price Lack of telephoto
Autonomy No AMOLED screen
The power of SoC Fingerprint sensor on the side rather than under the screen
Efforts in low light

To see: the best offers to buy the Xiaomi MI 10T / 10T Pro at the cheapest price

OnePlus 8 Pro

One Plus 8 Pro

The OnePlus 8 Pro represents the very high end of the manufacturer. Compatible with 5G, the smartphone incorporates the latest cutting-edge technology that can be found on smartphones: Bluetooth 5.0, fingerprint sensor under the screen, ultra powerful processor, fast charging …

With a starting price of € 899 in its variant with 128 GB of internal memory and 8 GB of RAM, it is a direct competitor to the Galaxy S20 Ultra from Samsung and the P40 Pro from Huawei. If you are looking for a no-compromise smartphone, then the OnePlus 8 Pro is a great choice.

The + The –
Unparalleled screen quality
The quality of low light photos
General design
The Color Filter sensor that is not used much
Performance and autonomy
The price that tingles a bit
IP68 certification Still no one-handed operation

OnePlus 7T Pro

oneplus 7T pro

In terms of autonomy, the OnePlus 7T Pro is very enduring, in particular thanks to its battery with a capacity of 4085 mAh. Coupled with fast charging technology Warp Charge 30T, providing a gain of 1 to 70% in 30 minutes and 1 to 100% in 60 minutes, it is very quick to recharge.

On the audio side, the smartphone offers two stereo speakers arranged as on the 7T. The photo module is composed of three sensors which are distributed in this way: a wide-angle sensor, a 3x telephoto lens and an ultra-wide-angle sensor (117 °). The front sensor is located in a retractable module.

Best quality price report

Xiaomi Mi 10T Lite 5G

Xiaomi mi 1OT Lite 5G

With the Mi 10T Lite, its new product, it is targeting the smallest purses by offering a terminal for less than 300 euros, but which does not want to be “cheap”. It logically succeeds the Mi 9 lite, which was a good surprise in 2019.

At this price, it is necessary to make compromises. However, Xiaomi promises a lot of things at the technical level. The main feature of the terminal is to be equipped with 5G, which makes it one of the cheapest compatible products on the market today. More information in our review of the Xiaomi Mi 10T Lite 5G.

The + The –
5G compatible A slightly outdated overlay
Its contained price
120 Hz screen
Fast charge

Google Pixel 4a 5G

Google Pixel 4A 5G

The Google Pixel 4a 5G is a smartphone available from 499 €. It offers 5G compatibility, a simple design, but effective, the Pixel 4A 5G is made of polycarbonate, a light and strong material that makes it pleasant to use, no frills. Larger than the regular Pixel 4A, it boasts a 6.2-inch screen that takes up 84% of the available space, with a resolution of 1080 × 2340 px. It is thus the largest smartphone model in the Pixel family at Google.

With its Qualcomm processor and Snapdragon 765G chip, the Pixel 4A 5G is perfect for regular and ordinary use, but also for gaming. The Qualcomm processor has indeed already proven itself on other smartphone models on the gaming side.

On the photo side, it remains simple, but once again effective, with a 27mm and 12.2MP wide-angle lens at the rear and a 16MP ultra-wide-angle lens. Outdoors, at night or against the light, smartphone tests are formal: photography enthusiasts will find what they are looking for with this smartphone.

Finally, the good news: if the Pixel 4 and 4 XL did not shine with their long battery life, Google has improved with the Pixel 4A 5G which has nothing to envy the competition. With its battery of 3885 mAh, it can last for 2 days with typical use and charges to 100% in just over an hour.

The + The –
Photo quality Plastic case not waterproof
No 90Hz
Large OLED display, good quality
No super fast charging and wireless charging

RealMe X50 Pro

Realme X50 Pro

For a price of 499 €, the Realme X50 Pro offers many advantages. In addition to its 5G compatibility, the smartphone has the powerful Snapdragon 865 processor, 8 GB of RAM and an internal memory of 128 GB UFS 3.0, not expandable.

The photo part is also very good, with the presence of 4 sensors located at the rear, the main one being 64 megapixels. Its battery with a capacity of 4200 mAh provides excellent battery life and also supports 65 W fast charging.

Finally, the terminal sports a superb 6.44-inch OLED screen offering a definition of 2400 x 1080 pixels. It can be configured to a 90Hz refresh rate. More information in our full review of the Realme X50 Pro.

The + The –
High performance Low light photos
Fast charge 65W
5G compatible
Nice design

OnePlus North

OnePlus Nord best value for money smartphone

The OnePlus North represents the mid-range of the Chinese manufacturer. The latter embeds the Snapdragon 765G processor (5G compatible) coupled with 8 GB or 12 GB of RAM and 128 or 256 GB of internal storage memory in UFS 2.1. The Oneplus Nord has the advantage of being compatible with the future 5G network and promises excellent autonomy with its integrated battery of 4115 mAh compatible Warp Charge 30T (30W / from 0-70% in 30 min).

The display part is provided by a 6.44-inch screen in 20: 9 aspect ratio, with 90Hz refresh rate and HDR10 + and Gorilla Glass 5 protection on the front and back with a plastic casing around it. The smartphone is also distinguished by its photo part, rather neat for a smartphone in this price range: it consists of a 48-megapixel main module designed by Sony (IMX586), an 8-megapixel ultra-wide-angle sensor, a 5 megapixel depth sensor and a macro module.

To see: the best offers to buy the OnePlus Nord at the cheapest price

The + The –
Good performance No waterproof certification
Excellent autonomy No wireless charging
Photo quality
Very fast recharge / strong>

Best cheap smartphone

Realme 7i

Realme 7i

For less than 200 euros, the Relame 7i offers a technical sheet and interesting features. The terminal sports a 6.5 ″ HD + definition touch screen (720 x 1600 pixels). It is powered by the Helio G85 Octo-Core processor clocked at 2.0 GHz, supported by 4 GB of RAM and a memory with a capacity of 64 GB.

Its large capacity battery (6000 mAh) is also compatible with fast charging and allows you to easily last a whole day. Security level, the smartphone has a fingerprint sensor on the back. Finally, on the photo side, the smartphone is equipped with three 48 + 8 + 2 MP sensors as well as an 8 MP selfie sensor.

The + The –
Correct performance Low light photos
Excellent autonomy
Screen calibration
90 Hz screen

Samsung galaxy m51

Samsung galaxy m51

The Samsung Galaxy M51 offers a technical sheet worthy of the best mid-range. The display is entrusted to a 6.7-inch Infinity-O Super AMOLED Full HD + panel. Its battery has a capacity of 7000 mAh 25W fast charge compatible ensures spectacular autonomy.

The Galaxy M51 smartphone has an Octa-core processor coupled with 6 GB RAM memory and 128 GB of internal storage. On the photo side, we find a 64 MP main lens, 12 MP ultra wide-angle lens, 5 MP portrait mode, 5 MP macro mode.

The + The –
Its screen Imposing size
Monstrous autonomy
No 90Hz
Beautiful photos, even in low light
His weight

Xiaomi Redmi Note 8 Pro

Xiaomi Redmi Note 8 Pro

The SoC Helio G90T allows the Redmi Note 8 Pro to offer a 64 MP photo sensor provided by Samsung. It is officially the first smartphone to include this photo sensor. The latter is accompanied by three other sensors: an 8MP ultra-wide-angle module, a 2 MP depth sensor and a 2 MP macro sensor. For the rest, the smartphone is equipped with a 6.53 inch FHD + LCD display which occupies 91.4% of the facade. On this side, the affiliation with the previous models of the range sounds obvious.

The 20 MP selfie camera is housed in a notch in the shape of a water drop. The SoC is supported by 6/8 GB of RAM and 64/128 GB of internal storage expandable up to an additional 256 GB. Its battery 4500 mAh is compatible with QuickCharge 4+ fast charging and comes with an 18W charger. No fingerprint sensor under the screen, it is located at the rear, mid-range requires.

Xiaomi Redmi Note 8T

Xiaomi redmi note 8T

The Xiaomi Redmi Note 8T sports a 6.3 ″ Full HD + resolution screen of 1080 x 2340 pixels with a 4000 mAh battery, ensuring long battery life. On the hardware side, there is a Qualcomm Snapdragon 665 Octo-Core processor clocked at 2.0 GHz coupled with 4 GB of RAM. Finally, on the photo side, the Redmi Note 8t is equipped with a 48 + 8 + 2 + 2 MP four-sensor camera that allows you to take high-resolution photos. Offered below 200 euros, it is quite simply the smartphone offering the best value for money at the moment.

We are more used to leaving WiFi, Bluetooth, and cellular data active all the time. However, this network access overlay often becomes redundant, for example when you are at home, or in a place with WiFi. As soon as possible, turn off WiFi, Bluetooth and / or cellular data to achieve significant battery savings.

We also advise you to limit the background tasks of the most demanding applications. Which is possible in the latest versions of Android. Also review app permissions in Settings> Applications – in particular the location and use of data, when this does not seem essential.

The simplest remedies are often the best: all smartphones on the market have a battery saver feature. This feature optimizes the operation of Android so that it requires as little power consumption as possible.

And to go further:

Leave a Comment