The best smartphones with the best battery backup offer a long life battery mobile in bangladesh that users can depend upon. The long battery backup mobiles can ensure that your smartphones never run out of battery as you watch movies, browse the internet, play games and listen to music. The best battery life mobile phones available in the market today are not necessarily the ones with huge battery capacity but are instead the perfectly optimised to suit every use case. Not every best battery backup phone in India offers a long-lasting battery life and therefore it can be quite a hassle to choose a mobile with the best battery backup. Here is a list of the smartphones with the best battery life that you can buy in India.

　　POCO X3

　　Poco X3 comes equipped with a large 6,000mAh battery which also supports 33W fast charging out-of-the-box. The phone offers a long lasting battery that brings with it upto 14 hours of gaming, 31 hours of video viewing and 45 hours worth of calling on a single charge. It features a 6.67-inch display that supports 120Hz refresh rate and has a punch-hole cutout for the selfie camera. The Poco X3 is powered by the Qualcomm Snapdragon 732G processor with an octa-core CPU and Adreno 618 GPU. This is paired with upto 8GB RAM and 128GB storage options to choose from. It has quad cameras on the back that consists of a 64MP primary camera, 13MP ultra-wide-angle camera with 119-degree field-of-view, 2MP macro camera and 2MP depth sensor. There is a 20MP selfie camera on the front. The Poco X3 has stereo speakers and supports Hi-Res audio playback. The power button on the Poco X3 doubles up as a fingerprint reader.

　　SAMSUNG GALAXY F62

　　Galaxy F62 is Samsung's latest mid-range phone that focuses on keeping things simple with its big battery, display and powerful processor. The Galaxy F62 promises flagship-like performance with its 6.7-inch Full HD+ resolution AMOLED display. This 9.5mm thick phone weighs 218 grams and houses a punch-hole cutout in the top-center for the selfie camera. One of its main features is the presence of the Exynos 9825 processor with a configuration that offers an octa-core CPU running at up to 2.7GHz sat next to a Mali0G76 GPU. The phone offers a high amount of RAM and storage, with the latter expandable using a MicroSD card. It runs on Android 11 based OneUI 3.1 out-of-the-box. Samsung Galaxy F62 comes with a 64MP primary camera set-up that also houses a 12MP ultra-wide-angle camera and a 5MP depth sensor and a 5MP macro camera. On the front, there is a 32MP selfie camera for selfies. However, the biggest highlight of the F62, and possibly the biggest reason why it should be considered for purchase is its large 7,000mAh battery that supports 25W fast charging.

　　REALME NARZO 30A

　　Realme Narzo 30A features a 6.5-inch HD+ resolution display along with a waterdrop notch cutout. The phone measures 9.8 millimetres in thickness and weighs around 205 grams. The Narzo 30A packs in the MediaTek Helio G85 processor paired with 3GB/4GB RAM and 64GB/128GB storage options to choose from. The phone also supports microSD cards of upto 256GB and runs on Realme UI. Realme Narzo 30A comes with a dual camera setup on the back that consists of a primary 13MP camera and a 2MP black and white camera. On the front, there is an 8MP selfie camera housed within the notch cutout. However, the biggest feature of the Narzo 30A, one that definitely makes it worth buying is its big battery life. This is because the Narzo 30A is equipped with a 6,000mAh battery with support for 18W fast charging. This should be good for watching movies and playing games on it.

　　POCO M3

　　The Poco M3 is the successor to the Poco M2 and features a new design with an extended camera module and a textured back panel. The Poco M3 also has a triple camera setup along with a high-capacity battery to boot. The phone is 9.6 millimetres at the thickest point and weighs 198 grams. The Poco M3 features a 6.53-inch Full HD+ display with a waterdrop notch cutout for the selfie camera. This gives the screen a 19.5:9 aspect ratio and is further topped with a layer of Gorilla Glass 3. It is powered by the Qualcomm Snapdragon 662 processor with an octa-core CPU and Adreno 610 GPU. This is paired with 4GB RAM and upto 128GB storage variants. The phone has stereo speakers and a side-mounted fingerprint reader. It is fitted with a 6,000mAh battery that supports 18W fast charging. Poco claims that the M3 is capable of lasting 40 hours on calling or 196 hours of music playback or 17 hours of video viewing. The Poco M3 has a triple camera setup on the back that consists of a primary 48MP camera with an f/1.8 aperture, a 2MP macro camera and a 2MP depth sensor.

　　XIAOMI REDMI 9 POWER

　　The Redmi 9 Power is the fifth smartphone in the Redmi 9 lineup after the Redmi 9A, Redmi 9i, Redmi 9 and Redmi 9 Prime. The phone is also equipped with a large capacity battery to boot. Xiaomi Redmi 9 Power features a 6.53-inch Full HD+ (2340 x 1080 pixels) resolution display with a waterdrop notch cutout for the selfie camera. The screen is topped with Gorilla Glass 3. It measures 9.6 millimetres and weighs 198 grams and has a plastic built. The phone is powered by the Qualcomm Snapdragon 662 processor with an octa-core CPU and Adreno 610 GPU. This is paired with 4GB RAM and upto 128GB storage options to choose from. The Redmi 9 Power also offers storage expansion via microSD card for upto 512GB. It has a quad-camera setup on the back with a 48MP primary camera, an 8MP ultra-wide-angle camera, a 2MP macro camera and a 2MP depth sensor. On the front, there is an 8MP selfie camera housed within the waterdrop notch. The Redmi 9 Power has stereo speakers along with a side-mounted fingerprint reader. It is equipped with a 6,000mAh battery that supports 18W fast charging.

　　SAMSUNG GALAXY M51

　　The Galaxy M51 is one of the best smartphones when it comes to battery life. It comes 7,000mAh battery. This simply means you will have a hard time draining the battery of this smartphone in one, two, even three days if used moderately. The M51 also relies on the Snapdragon 730G SoC and rocks a 64MP quad camera stack, making it quite a wholesome offering. There are a number of interesting things to note about the Galaxy M51, however, the biggest highlight of the device is definitely its 7000mAh battery pack which can be charged using a 25W charger that Samsung ships with the device in the box. Apart from this, the Galaxy M51 also goes big on cameras with the device coming with a quad-camera set-up with a primary 64-megapixel lens that can capture some really impressive photos. The Galaxy M51 gets a rear camera setup with a 64-megapixel primary sensor with an f/1.8 aperture. Sat next to it is a 12-megapixel ultra-wide-angle lens that brings with itself the 123-degree field-of-view, a 5-megapixel depth sensor, and a 5-megapixel macro camera.

　　ASUS ROG PHONE 5 128GB

　　The Asus ROG Phone 5 has gaming DNA through and through, whether it's in the choice of components or the phone's design. The ROG Phone 5 is the fourth iteration in the series of gaming phones by Asus that features all the bells and whistles that one would expect from a gaming phone. It’s powered by a flagship Snapdragon processor with a high refresh rate screen and a high-capacity battery to boot. Asus built this phone to take on the most demanding of tasks, and as such, it runs a Qualcomm Snapdragon 888 SoC at its heart, paired with 12GB of LPDDR5 RAM. It has a 144Hz AMOLED display which makes not just gaming, but also using this phone in general a very fluid experience. The phone comes with Air Triggers to help you score better in your game, and a USB Type-C port on the side so that a charging cable never gets in the way of your gaming session. For cameras, the ROG Phone 5 comes with a triple camera setup that consists of a primary 64MP camera with an f/1.8 aperture, a 13MP ultra-wide-angle camera with 125-degree field-of-view and a 5MP macro camera. On the front, there is a 24MP selfie camera with an f/2.0 aperture. The rear cameras are capable of recording in 8K UHD at 30FPS and 4K UHD at up to 60FPS with support for OIS and EIS. The battery on this phone is a massive 6000mAh unit, again designed to let you game for hours upon hours.

　　POCO X3 PRO

　　The Poco X3 Pro is a mid-range smartphone that is powered by the flagship Qualcomm Snapdragon 860 processor. The phone offers superior performance, has a high-refresh-rate display, quad cameras on the back and a fast-charging battery to boot. The Poco X3 Pro features a 6.67-inch Full HD+ (2400 x 1080 pixels) resolution display with a punch-hole cutout in the centre for the selfie camera. It is topped with Gorilla Glass 6 for added protection. The Poco X3 Pro is powered by the Snapdragon 860 processor with an octa-core CPU running at upto 2.96GHz. This is paired with upto 8GB RAM and 128GB storage. It’s got a quad-camera setup on the back with a 48MP primary camera, 8MP ultra-wide-angle camera with 119-degree field-of-view, 2MP macro camera and 2MP depth sensor. On the front, there is a 20MP selfie camera. The Poco X3 Pro is equipped with a 5,160mAh battery that supports 33W fast charging out-of-the-box.

　　XIAOMI REDMI NOTE 10 PRO MAX

　　Redmi Note 10 Pro Max features the same 6.67-inch Full HD+ Super AMOLED display with 120Hz high refresh rate support. The screen offers upto 1200 nits brightness, is HDR10+ certified and is topped with a layer of Gorilla Glass 5. The phone uses a Qualcomm Snapdragon 732G processor with an octa-core CPU and Adreno 618 GPU. This is paired with upto 8GB LPDDR4X RAM and upto 128GB UFS 2.2 storage options to choose from. The Redmi Note 10 Pro Max also has a quad-camera array on the back headlined by a 108MP camera that uses ISOCELL HM2 sensor. This is sat next to an 8MP ultra-wide-angle camera with 118-degree field of view, a 5MP macro camera and a 2MP depth sensor. The phone also has a 3.5mm audio jack, IR sensor, stereo speakers, 360-degree ambient light sensor and more. Further, it is also equipped with a 5,020mAh battery that supports 33W fast charging out-of-the-box.

　　OPPO F19 PRO

　　The Oppo F19 Pro comes equipped with a 4,310mAh battery that supports 30W fast charging out-of-the-box. The F19 Pro features a 6.43-inch Super AMOLED display that offers a Full HD+ (2400x1080 pixels) resolution and has a punch-hole notch cutout for the selfie camera upfront. It is powered by the MediaTek Helio P95 processor with an octa-core CPU and PowerVR GM9446 graphics. This is paired with 8GB RAM and upto 256GB storage options to choose from. It runs on ColourOS 11.1 which is based on Android 11. There is a 48MP primary camera on the back with an f/1.7 aperture followed by an 8MP ultra-wide-angle camera, a 2MP macro camera and 2MP depth sensor. There is a 16MP selfie camera on the front. Additionally, the Oppo F19 Pro has an in-display fingerprint sensor as well.