Best 20,000mAh Power Banks for Mobile Phones (September 2023)

Ambrane is an indigenous brand that has built quite a reputation for itself when it comes to manufacturing smartphone accessories and this power bank is just one of the many products they offer. The power bank supports up to 20 watts of fast charging, which means your smartphone will have a full battery in no time. Ambrane has equipped it with 2 USB Type-A output ports, a micro USB port to charge itself, and a USB Type-C port that can be used as input and output ports. Its 20,000 mAh battery and multiple charging ports make sure that you can charge multiple devices without any problem or a single device multiple times. To make your lives even easier, Ambrane has equipped it with a sturdy body, LED battery indicator, pass-through charging support and multi-layer charging protection technology that keeps the power bank as well as the power bank from a number of mishaps.

Syska Power Pro is a high capacity power bank with multiple charging ports for all your charging needs. It is equipped with a lithium-polymer battery which is 20,000 mAh in capacity. The multiple charging ports (2 USB Type-A for output and a single micro USB port for input) and high-capacity battery allow you to charge multiple devices simultaneously. Thanks to its high compatibility, you can use it to charge your smartphone, tablet, wireless earphones, smartwatch, speakers, and other devices. To ensure power bank, device, and user’s safety, Syska has used multiple charging protection technologies that shut down the power bank when the current, voltage, temperature, or any other factor goes out of safe limits. This 20,000 mAh power bank features a power button to ensure that the user has full control over the power bank.

If you want good quality products without burning a hole in your pocket, you should consider buying this Flipkart SmartBuy power bank. This 20,000 mAh power bank can charge a single device many times or multiple devices at a single time. When it comes to ports, Flipkart has made sure to leave no stones unturned and equipped it with dual USB Type-A output ports, a micro USB input port and a USB Type-C port that works as input as well as output. It even has a power button that lets you power it on and off anytime you want. Its multiple charging protection circuits combined with its sturdy ABS body keep the power bank from harm’s way while also protecting your device from high current, voltage and charging temperature. All of this is packed inside a compact shell, making it easy to carry around.

When it comes to manufacturing PC and smartphone accessories, Intex is one of the best brands out there, and all credit goes to their quality products, such as this power bank. This 20,000 mAh power bank holds enough juice to power smartphones, tablets, wireless headphones, speakers and other devices multiple devices before running out of power. Intex has paired its high capacity lithium-polymer battery with multiple ports (2 USB Type-A output ports, a USB Type-C input port and a micro USB input port) to charge multiple devices at a time. You can use its power button to control the power bank and know how much charge it’s currently holding, thanks to the 4 point LED indicator installed at the front. This 10.5-watt power bank measures 7 x 2 x 13 centimetres and weighs just 400 grams making it your travel pal.

No list of the best power banks is complete without one from Portronics, and this list is no different. This Portronics power bank features a 20,000 mAh lithium-polymer battery which acts as a boon in disguise for people who go out a lot and aren’t always close to a power socket to charge their devices. Its dual input (micro USB and USB Type-C)/output (dual USB Type-A) ports act as the cherry on the top. Portronics has equipped this 10.5-watt power bank with 6 level protection that protects your device and power bank from short circuit, input/output over-voltage, over-current, overheating and incorrect insertion. All of this is packed in a hard shell that protects the power bank from everyday wear and tear, making it a good choice for adventure junkies and office workers alike.

Urbn claims that this 20,000 mAh power bank can charge a 3,000 mAh phone up to 4.7 times and a 4,000 mAh phone up to 3.5 times. It features two USB ports for output along with a Type-C port for fast charging (20W). It allows two-way fast charging, so you don’t have to wait for a long period for your power bank or device to charge for a long period. It also has a Micro as well as a Type-C port for input, so you won’t have difficulty finding a compatible cable to charge the power bank. It can be charged in five hours using an eighteen Watt adapter and in 10 to 12 hours using a 2A/5V adapter. Urbn has left no stone unturned when it comes to safety and has equipped this power bank with 12-level protection to safeguard your device from mishaps such as overcharging, short circuits, thermal shutdown, etc. It has an LED indicator that indicates the battery percentage, so you can charge or use it accordingly. The premium finish, sleek design and carbon fibre texture make it a great travel companion!

If you are on the lookout for a modern power bank that you can flaunt while charging your phone, then this one by Zebronics might be a good investment. Its 20,000 mAh Li-Polymer battery can charge your phone or other devices anytime and anywhere. Be it a long road trip or an emergency situation without any charging point in sight; this power bank will have your back. It has a 5V/2A DC input (Type-C and Micro USB) and 5V/2.4A DC output (two USB ports), so you don’t have to queue up devices for charging. The LED indicator at the top shows the battery level and also contributes to the power bank’s stunning looks so that you can check the battery percentage with a single glance. It even has a torchlight for emergencies and is compatible with a wide range of devices, so you can charge it all using a single power bank. It weighs approximately 408 grams, has dimensions ‎2.7 x 7 x 14 cm and has a sturdy design which makes it a great addition to your travel kit.

Mi offers a high capacity power bank of 20,000 milliampere-hour(mAh) and lets you charge three devices simultaneously. It also features a robust twelve layered design to protect the device being charged from overcurrent, overheating and short circuits. Moreover, you can charge low power devices such as Mi Band 4, Mi True Wireless earphones, etc., by switching to the ‘Low Charging Mode’ for two hours by simply pressing the power button twice. It also supports 18W fast charging, so you can charge your devices faster. The Type C port or micro USB supports the re-charging of this powerful power bank. This makes sure you don't need to search for a particular cable to charge your power bank. Moreover, its high-density lithium polymer battery uses advanced resistance-capacitance sensors, which not only ensures safety but also fixes the discharging voltage. Suitable for people who travel a lot, this power bank will help you keep your devices charged anytime. The best part is that this innovative and premium quality power bank is manufactured in India!

If you want to invest in a power bank that not only has a monstrous battery with high capacity but is also easy to hold for longer durations, then do check out this power bank by Realme. It is embossed with tens of thousands of micro-stripes, giving it a unique grid-like texture that ensures a firm grip and is soft to touch. It supports 18W quick charge and features two USB-A ports and a USB-C port so that you can charge three devices in one go! It also features a low current charging mode for AloT devices which can be enabled by double-tapping the power button. Moreover, the low charging current mode protects and increases the longevity of batteries of your AIoT devices. Realme has also put in a 14 layered chip protection that safeguards your device from overcharging, short circuits and other mishaps. Moreover, the micro USB and USB Type-C ports (and the two in one cable) make it easy to charge using either of the ports and makes it compatible with a plethora of gadgets. It also supports 18W fast charging so that you can charge devices and the power bank faster than before!

This power bank by Redmi comes with twelve layered advanced chip protection that provides safety and increases charging efficiency. You can charge AIoT devices like earphones, fitness bands or headsets using the Low power mode, which can be enabled by double-tapping the power button. This power bank also supports 18W fast charge, which helps charge your device in less time. It has an integrated circuit with 12 protective layers to protect the power bank and the device being charged against resistance, temperature, overvoltage, short-circuit, overcharging or similar conditions. It also has universal compatibility so that you can charge all kinds of devices using Micro USB and Type-C ports. The high-density Li-polymer battery has a capacity of 20,000 mAh and can charge your phone multiple times. You can charge this power bank using a Type-C or a Micro USB cable as it has input ports for both, which makes it easy to charge. Besides offering smart features like a quick two-way charge, it also sports a stylish, anti-slip edge texture that allows firm grip to prevent accidental slips and falls.