The mobiles with the best battery you can buy in 2021

Autonomy is one of the most important factors when choosing a new mobile, so you should always analyze this feature well before buying a terminal. It is not easy to find the smartphone with the best autonomy since the market comprises thousands of different models. To make your search easier, we will prepare a buying guide with the mobiles with the most battery that you can buy in 2021.

The criteria that we have applied to the selection have been, in the first place, that the phones can be purchased without problems in stores in the western market. Asia has seen the launch of some terminals with better autonomy, but their sale has not yet taken place in countries like Spain.

In addition, with the intention that it is a current selection, we have chosen to limit it to those phones launched in 2020 or later. Finally, we have also considered our analysis of the selected terminals to know if their autonomy is really excellent or is limited to large numbers that are not reflected in quality later.

Without further ado, we will now recommend the mobiles with the most battery that you can find on the market in 2021.

• Phones with better battery
• Aspects of assessing when choosing a mobile for its battery
• Which mobile has the best battery?
• Which mobile has more milliamps?
• Cheap phones with better battery
• Mobile phones with a 10,000 mAh battery
• Phones with 6,000 mAh battery
• High-end phones with better battery

Phones with better battery

Autonomy to spare is what the mobiles that we will talk about next have, with the best batteries of the moment. We tell you its most outstanding specifications so that you can choose which one is best for you.

• Oukitel WP15
• Ulefone Power Armor 13
• DOOGEE S88 Plus
• ASUS ROG Phone 5
• POCO M3
• Samsung Galaxy M51
• Xiaomi Redmi 9T

Oukitel WP15

The Oukitel WP15 is not only a resistant mobile, but it is also one of the terminals with the most battery at the moment. Specifically, it mounts a 15,600 mAh battery that, you can be sure, will not leave you thrown at the first change. It is compatible with 18W fast charging, so you will have to spend several hours glued to the charger to charge it fully. Without a doubt, this Oukitel WP15 can exceed three or four days of use.

Its resistance and gigantic battery make it the ideal mobile to accompany you during excursions and outdoor activities. Of course, that large battery has consequences since it is a large phone that touches 500 grams in weight. On its front, it has a 6.52-inch IPS screen with HD + resolution.

Power is handled by the MediaTek Dimensity 700 processor, with an integrated 5G modem so you can connect to the fastest networks. In addition, it has 8 GB of RAM and 128 GB of internal storage expandable up to 512 GB with a microSD card. Its operating system is Android 11, and it can take more than correct pictures thanks to its 48 MP main camera. If you want to get the Oukitel WP15, it is priced at 459.99 euros on Amazon.

Ulefone Power Armor 13

Of similar characteristics is the Ulefone Power Armor 13, another resistant mobile that hides a huge battery inside. To provide the several days of autonomy that this model provides, it uses a 13,200 mAh battery. In this case, it supports a fast charge of up to 33W, so the waiting times with the charger are shorter. Furthermore, the Ulefone phone also supports 15W wireless charging and 15W reverse wireless charging.

In the datasheet of the smartphone, we also find an ultra-resistant design, which is not damaged by bumps, drops, or scratches. In addition, it mounts a 6.81-inch IPS screen with resolution Full HD +. This panel not only looks great, but it is also huge in size. This means that the phone is also large, with a thickness of 20 millimeters and a weight of 492 grams.

The processor in the Power Armor 13 is MediaTek Helio G95, a chip that offers great performance, especially when it comes to gaming. It has 8 GB of RAM and 256 GB of internal storage, so you can store thousands of files and install the apps you need. Finally, it has a 48 MP main camera, an 8 MP ultra-wide-angle, a 2 MP macro, and a 2 MP depth sensor.

The Ulefone Power Armor 13 just came on the market a few months ago, with a price of 419.99 euros on Amazon, although it is possible to find it with specific offers that lower its price.

DOOGEE S88 Plus

Another mobile with the most battery on the market is the DOOGEE S88 Plus, which equips a 10,000 mAh battery. Being smaller than the models mentioned above, it also has a smaller size. This battery lasts several days and supports a fast charge of 25W, wireless charging of 10W, and reverse wireless charging of 5W.

The DOOGEE S88 Plus is a mobile with a 6.3-inch IPS screen with resolution Full HD +, quality more than correct. In addition, it has the MediaTek Helio P70 processor as the master of ceremonies, which offers excellent performance. We add 8 GB of RAM and 128 GB of storage, with a microSD card slot to expand the available memory.

In the photographic section of the phone, we find a 48 MP main camera that is the one that captures the best images. It has the help of an 8 MP ultra-wide-angle and a depth sensor, also 8 MP. If you want to buy the DOOGEE S88 Plus, you can do it for an original price of 319.99 euros on Amazon. If you wait for offers -it is usual-, you can save a few euros.

ASUS ROG Phone 5

In addition to being resistant, “gaming” mobiles are also characterized by mounting gigantic batteries that provide hours and hours of play. One of the standouts in this category is the ASUS ROG Phone 5, an impressive model in every respect. If we focus on autonomy, it has a 6,000 mAh battery with a 65W fast charge, which can be charged in less than an hour.

This ROG Phone 5 also pays off for its 6.78-inch AMOLED display with resolution Full HD + and an impressive refresh rate of 144 Hz. This means that the images are not only sharp but also with the greatest fluidity. The Qualcomm Snapdragon 888 5G processor, the most powerful on Android, is the one that is responsible for running all games and apps without signs of lags or slowdowns. The operating system is Android 11 under the ROG UI customization layer.

In addition to the photography battery you are concerned about, you should know that this smartphone has a triple rear camera: 64 MP main, 13 MP ultra-wide-angle, and 5 MP macro sensor. Your starting price? 899 euros in the 12 + 256 GB version.

POCO M3

Although it has been on the market for a little longer and already has the M3 Pro 5G as a successor, the POCO M3 is still one of the mobiles with the most battery. This cheap Poco terminal has a 6,000 mAh battery with 18W fast charging that reaches two days of use without problems, as we discussed in the analysis of the POCO M3.

Considering that its price is below 200 euros, the POCO M3 is a good option because it also has a 6.53-inch IPS screen with resolution Full HD +, so it offers an uncommon sharpness in mobile phones of this price. Its brain is the Qualcomm Snapdragon 662, which, together with 4 GB of RAM, ensures good performance when executing basic tasks. If we add that it uses a 48 MP main camera, the POCO M3 is one of the best mobiles under 200 euros.

Samsung Galaxy M51

The largest battery ever seen in a Samsung mobile is inside the Samsung Galaxy M51, with an impressive 7,000 mAh capacity. The South Korean firm thus maintains the main characteristic of the Galaxy M series, a wide autonomy that allows the user to forget about the charger for several days.

Considering its generous battery, the most normal thing is that this Galaxy M51 is compatible with fast charging. And so it is because it can be loaded with a maximum power of 25W. If you are looking for a cheap terminal that stands out for its autonomy, the Samsung Galaxy M51 is the best option.

Other features stand out in the datasheet of this South Korean mobile, such as the 6.7-inch Super AMOLED screen with Full HD + resolution that occupies almost its entire front. Thanks to the Qualcomm Snapdragon 662 processor, the Galaxy M51 can offer great performance on a day-to-day basis, something in which the 6 GB of RAM also helps. Finally, you can take perfect pictures thanks to a quad rear camera with a standard 64 MP sensor, 12 MP ultra-wide-angle, 5 MP macro, and 5 MP depth sensor.

Xiaomi Redmi 9T

The Xiaomi Redmi 9T is one of the mobiles with the most battery on the market. Specifically, yours has a 6,000 mAh capacity. As for fast charging, it supports the power of up to 18W, with a charger included in the box. In practical terms, this translates into two days of autonomy, and even more if the use you give the terminal is not intense.

Other aspects that stand out in the list of specifications of the Redmi 9T are its 6.53-inch IPS screen with Full HD + resolution, its Qualcomm Snapdragon 662 processor, and its 48 MP main camera. In general, it is a perfect phone for those users who only need it for basic tasks and who are looking to spend less than 200 euros on the purchase.

Aspects of assessing when choosing a mobile for its battery

Entering the market to find a mobile with excellent autonomy will help you discover that different aspects make up the Battery section. Next, we talk about those details that you should take into account when choosing.

• Milliamp hours: Looking at the milliamp-hours (mAh) of the battery is key if this is the feature of the phone that concerns you the most. It represents the electrical charge that the battery is capable of storing. Therefore, the more milliamps it has, the longer it will last. Normally, the more mAh the battery has, the larger the size of the battery and, directly, the dimensions of the phone. However, two mobiles with the same mAh may not have the same duration since other factors such as the system’s optimization, the battery’s materials, the screen brightness with which the terminal is used, etc.
• Fast charging system: It is also important to know if the phone in question has a fast-charging system, a common detail in the market for a few years. By using more voltage and amperage than traditional charges, manufacturers have dramatically reduced charging time. Thanks to this feature, it is now possible to fully charge some batteries in just one hour. To take this aspect into account, you must look at whether the phone you are going to buy has a fast charge and how many are its watts (W). Typically, more watts represent more charging speed.
• Wireless charging and reversible wireless charging: Other technologies that have appeared on the market in recent years contact wireless charging and reversible wireless charging. With the first one, the mobile is charged by contacting a base connected to a power source. In the second case, we have reversible wireless charging, which allows the phone to act as a charger for other devices when in contact with them.

In addition to these three main aspects, others have a significant influence, such as the operating system. The more modern the software, the better the phone’s battery management. On the other hand, is also the type of connector important charger: micro USB, USB Type C, etc.

Which mobile has the best battery?

The mobile with the best battery is the Ulefone Power Armor 13, a selection for which we have taken into account both the battery capacity and the fast charge it supports. In this sense, the Ulefone phone mounts a 13,200 mAh battery that can support the power of up to 33W. Thus, it not only offers more than three or four days of autonomy but it can also be charged in less time than usual in resistant mobiles.

Which mobile has more milliamps?

The mobile with the most milliamps is the Oukitel WP15, with a battery of an impressive 15,600 mAh. As you can imagine, it is a mobile that lasts days without going through the charger. We have not chosen it as the mobile with the best battery because its fast charge is only 18W, which means that it needs several hours together with the charger to charge fully.

Cheap phones with better battery

The autonomy of mobile phones has starred in an incredible advance in recent years, which makes it easier for us to enjoy phones with large batteries at a reduced price. In addition to the mobiles mentioned above, such as the POCO M3 or the Redmi 9T, these are the best for around 200 euros :

• Oukitel K15 Plus
• DOOGEE S59 Pro
• Samsung Galaxy M12

Oukitel K15 Plus

Good Oukitel mobile with a giant battery that goes below 200 euros is the Oukitel K15 Plus. Specifically, it has a 10,000 mAh battery with 18W fast charging and reverses wireless charging so you can charge other devices. In addition, it has a 6.52-inch HD screen, MediaTek Helio A22 processor, 3 GB of RAM, and 32 GB of internal storage expandable up to 256 GB with a microSD card. To take pictures, it has a 13 MP main camera.

DOOGEE S59 Pro

For just over 200 euros, you can buy the DOOGEE S59 Pro, a smartphone with a 10,050 mAh battery that supports a fast charge of up to 25W. This translates into hours and hours of use, even if they are long games of play.

In addition, this DOOGEE S59 Pro mounts a 5.71-inch IPS screen with Full HD + resolution, MediaTek Helio P22 processor, 4 GB of RAM, and 128 GB of storage that can be expanded up to 256 GB with a microSD card. There are four cameras on the back: 16 MP main, 8 MP ultra-wide-angle, 8 MP macro, and 2 MP portrait.

Samsung Galaxy M12

The Samsung Galaxy M12 is another cheap mobile with a good battery. Specifically, it has a 5,000 mAh battery that provides up to two days of autonomy. To this, we add that it is compatible with 15W fast charging. If we look at the rest of the datasheet, we find that it equips a 6.5-inch LCD screen with HD + resolution and 90 Hz refresh rate, Exynos 850 processor, and a 48 MP main camera to take pictures.

Phones with 10,000 mAh batteries

The mobiles with 10,000 mAh batteries that adapt to the selection criteria that we talked about at the beginning are the following:

• DOOGEE S59
• Oukitel K15 Plus

DOOGEE S59

Among the mobiles with a 10,000 mAh battery is the DOOGEE S59; specifically, it has a 10,050 mAh battery that can be charged with a power of 25W. To this, we add that it mounts a 5.71-inch screen, MediaTek Helio A25 processor, 4 GB of RAM, and an ultra-resistant design that copes with drops, bumps, and scratches without problems. In addition, it has a quad rear camera led by a 16 MP main sensor.

Oukitel K15 Plus

We have already talked about it, but it is worth doing again because the Oukitel K15 Plus is one of the best mobiles with a 10,000 mAh battery. Supports 18W fast charging, with a charger included in the box. Other specifications that may interest you are a 6.52-inch HD screen, MediaTek Helio A22 processor, 3 GB of RAM, and a 13 MP main camera.

Phones with 6,000 mAh batteries

We go down to 6,000 mAh to tell you about mobiles that have batteries of this capacity. As you can imagine, the number of models available is greater than that with 10,000 mAh. These are the best mobiles with 6,000 mAh batteries.

• ASUS ROG Phone 5
• POCO M3
• realme Narzo 30A

ASUS ROG Phone 5

You already know him, because we have talked about him in previous lines. One of the best phones with a 6,000 mAh battery is the ASUS ROG Phone 5, which can last for long games. Plus, thanks to a 65W fast charge, it takes less than an hour to charge fully. 6.78-inch screen with 144 Hz refresh rate, Qualcomm Snapdragon 888 5G, and 64 MP main camera are other specifications of this ROG Phone 5.

POCO M3

We talk again about the POCO M3, a 6,000 mAh battery with an 18W fast charge. If the user is not very intense, it can perfectly reach the two days of autonomy. 6.53-inch IPS screen with Full HD + resolution, Qualcomm Snapdragon 662 processor, an 48 MP main camera are other features that stand out in the POCO M3 datasheet.

realme Narzo 30A

Another smartphone with a 6,000 mAh battery is the realm Narzo 30A, with 18W fast charging. In its datasheet, we also find a 6.5-inch LCD screen with HD + resolution and MediaTek Helio G85 processor, enough to offer good performance on a day-to-day basis. In addition, the realme Narzo 30A equips a 32 MP rear camera to take pictures. In practical terms, this means that the mobile realme can reach two days of autonomy if the use is not very intense.

High-end phones with better battery

Powerful, with quality screens, advanced photographic systems, and autonomy that makes you fall in love, this is how high-end mobiles with the best battery of 2021 are.

• Samsung Galaxy S21 Ultra
• ASUS Rog Phone 5
• Xiaomi Mi 10T Pro

Samsung Galaxy S21 Ultra

If we look only at the high-end, we must talk about the battery of the Samsung Galaxy S21 Ultra 5G. It is a 5,000 mAh battery with 25W fast charging, 15W wireless charging, and reverse wireless charging. As we saw in the review of the Galaxy S21 Ultra, the phone can reach two days of use on a single charge, although it is important to mention that it comes without a charger in the box.

The Galaxy S21 Ultra 5G is a spectacular phone in every way, with an impressive 6.8-inch Dynamic AMOLED 2X screen with WQHD + resolution and 120 Hz refresh rate. Power is more than enough thanks to the processor Samsung Exynos 2100; along with that, we add a 108 MP main camera to obtain photographs of outstanding quality.

ASUS ROG Phone 5

In the high-end range, the ASUS ROG Phone 5 also stands out, with a 6,000 mAh battery with a 65W fast charge, ideal for playing for hours without using the charger. In addition, the ROG Phone 5 has a 6.78-inch screen with a refresh rate and all the power of the Qualcomm Snapdragon 888 5G processor.

Xiaomi Mi 10T Pro

Another good high-end mobile with a great battery is the Xiaomi Mi 10T Pro, a 5,000 mAh battery with 33W fast charging. In addition to enduring the day of use without asking you to connect it to the charger, this Mi 10T Pro can be fully charged in just over an hour. On the other hand, it has a spectacular 6.67-inch screen with a refresh rate of 144 Hz, a Qualcomm Snapdragon 865 processor, and a 108 MP main camera for taking pictures.