You use your smartphones and tablets for various purposes other than just making calls. A lot of apps installed on the devices are running in the background all the time to provide you the necessary information as soon as they are available. So it is important to make sure that these devices don’t run out of fuel. To achieve this, a phone with a big battery is what you need.

Sadly, these days phone manufacturers are in a race to make the slimmest and the lightest devices. This doesn’t leave any room to fit a big battery inside the device which could last all day. Add to this, the powerful processors and high-resolution screens which are there to provide a better experience. You start your day with a fully charged phone and by afternoon/evening you often find yourself running around to find a power outlet. But worry not, there are many power banks available in the market which can charge your devices from 0 to 100 percent, multiple times.

A power bank is an external battery which comes in a case. It can be connected to the smartphones and other gadgets using a USB cable. You can charge the power bank using a power adapter just like you charge your phone. They are portable and lightweight so it’s easy to carry them in the bag. Power banks are not very expensive to buy and come in various capacities. It is important to buy the right one for yourself depending on how much of a power user you are.

Here a couple of points you should keep in mind before buying power bank:

  • A power bank’s full battery capacity can never be utilized to charge the device since some of the battery is lost due to the heat produced.
  • A milliampere-hour (mAh) is 1,000th of an ampere-hour ( Ah ). Both measures are commonly used to describe the energy charge that a battery will hold and how long a device will run before the battery needs recharging.
  • The power banks with higher capacities weigh more because they have more batteries inside the casing.
  • If you are planning to buy a power bank with capacities 10,000 mAh or more, you must get 2A (Ampere) charger to recharge the power bank faster. Or it will take at least 10 hours to recharge them (10,000 mAh) with the standard power adapters you get with your phones (usually 1A). Make sure that the power bank supports an input of 2A otherwise the 2A power adapter is no good.
  • Mostly power bank with high capacities (10,000 and more) come with an input of 2/2.1A.
    Similarly, while buying a power bank with ports having an output of 2/2.1A make sure that your phone supports it.
  • The power banks usually come with a USB cable but no power adapter to recharge the power bank.
    They usually have one or two USB ports to charge up to two devices at once. Keep in mind that the charging speed decreases when two devices are plugged in at the same time.

Power banks below 5000 mAh

Romoss PH20-407-A 4,000mAh

As the name suggests, this power bank comes with a capacity of 4,000 mAh. Most phones these days come with a battery anywhere between 1,500 mAh and 3,000 mAh. So depending upon the capacity of your phone’s battery, this power bank can fully charge the phone one or two times.This power bank has one USB port with an output of 1A which can charge the device with a battery of 2000mAh in about 2 hours. It has got 4 LED indicators to let you know how much charge the power bank is left with. Each LED indicates 25% of the charge. It also comes with a torchlight which can be useful in some situations. It is priced at around Rs. 700.

Amkette Fuel Card

This power bank is one of the slimmest power banks available in the market. It’s only 6.9mm thick and can easily slip into your pocket. IT comes with a battery capacity of 2,500 mAh and can be useful when you need a few more hours of usage out of your phone to get you through the day. The good thing about this power bank is the built-in micro USB cable to charge you phone which means you don’t need to carry an extra cable with you. It costs around Rs. 900.

Power banks with 5000 mAh and above

Lenovo Power Bank PB410 5,000 mAh

This power bank comes with a capacity of 5,000 mAh. This power bank has got good built quality. It comes with 2 USB ports, one with 1A and another with 2A output which lets you charge 2 devices simultaneously. It also comes with an overcharge protection which means it automatically stops when your device’s battery is fully charged. This one has also got 4 LED indicators to let you know of the charge left in the power bank. It costs around Rs. 1,400.

Mi Power Bank 5,000 mAh

Power banks from Xiaomi are one of the best when it comes to the built quality and safety features. This power bank has an aluminium casing and is only 9.9 mm thick. It includes 4 LED indicators and unlike Lenovo’s PB410 it comes with only one USB port with an output of 2.1A. Coming to the safety features, it has the overcharge and excessive discharge protection which protects the battery of your device and power bank from getting damaged.

It also comes with short-circuit protection which protects the battery and the motherboard in case of a short-circuit. These are just two of the many feature this power bank is equipped with. It costs Rs. 699. Mi power bank also comes with a capacity of 16,000 mAh which I will be mentioning later.

I would advise you to buy the Mi power bank from their official website because the online market is flooded with fake Mi power banks.

PNY BE-520

This power bank comes with a capacity of 5,200 mAh. It has a built-in torch and 4 LED indicators to tell the amount of charge left. Just like the Mi power bank it comes with various safety features like overcharge, over discharge, and short-circuit protection. It has got one USB port with an output of 2.1A. This power bank cost approximately Rs. 900.

HP F4C80AA Power Pack

This power bank from HP comes with a battery capacity of 7,500 mAh. It comes with 2 USB ports so that you can charge two phones simultaneously. They have an output of 2.1A each. Just like other power banks it has got 4 LED indicators to show the power remaining. It costs around Rs. 2,150.

Power banks above 10000 mAh

PNY BE-740

This power bank comes with a battery capacity of 10,400 mAh. Just like the BE-520 it comes with a torch light and 4 LED indicators to let you know the available battery. It has only one USB port with an output of 2.1A. Power banks with such capacity are better suited for people who travel a lot. It is priced at around Rs. 1,250.

TP-LINK TL PB 10,400 mAh

The TP-Link which is known for making WiFi routers also has a 10,400 mAh power bank. It comes with dual USB ports with a combined out of 3A which can come in handy for charging two devices simultaneously. It has got LED Indicators which let you know how much charge is remaining. And it comes with a built-in torchlight. It costs around Rs. 1,700.

Mi Power Bank 16,000 mAh

I am personally using this power bank from the last couple of months and am very pleased with its performance. Just like the smaller sibling, it has an aluminium casing which feels premium and has got all the safety features. It has two USB ports to charge two phones at a time. Both ports support an output of 2.1A but when used simultaneously maximum output is 3.6A. iPhone 6 has a battery capacity of 1,810 mAh and this power bank can charge it from 0 to 100 percent for 6-7 times. It costs Rs. 1,399

Anker 2nd Gen Astro E4 High Capacity 13,000mAh

Anker is one of the most popular power bank manufacturers. It has good built quality with rugged casing to protect it from getting damaged in case of accidental drops. This power bank comes with dual USB ports which can provide a charge speed of up to 3A, a torch light and 4 LED indicators just like other power banks. Anker claims that this power bank recharges in 6.5 hours using a 2A (2,000 mA) power adapter. It costs around Rs. 3,500.

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Note: The prices mentioned above are at the time of writing this article. These prices can change.