Power bank – A simple guide to buy best battery charger

In today”s era, most people use electronic devices almost on daily basis. Among the most popular and most used electronic devices are tablets and smartphones. But with the increasing use of these device, it needs lots of energy or power. This results in draining out of their batteries in a very short time. Without power these devices are almost useless, after all you cannot make a call from a smartphone with a dead battery. So power banks are introduce in the market to solve this problem. They can charge your mobile phones and tablets on the go and can bring your dead battery back to life.

What Exactly is Power Bank

\r\nPower bank is nothing but an external battery that is sealed inside a case. They also have a control circuit that controls the flow of power from power bank to the battery of your mobile. Most power banks have batteries that is made up of either lithium-ion or lithium-polymer. Power banks can be charged either from a USB drive or from the power outlet. Some power banks can be charged from solar energy and they are known as solar power bank.

Choosing a Power Bank

Power bank is very essential tool that is must have device for those who use smartphones heavily. But choosing a right power bank may be a difficult task, here are few basic things that you should consider before buying a power bank in India.


power bank in IndiaCapacity is the most important features that need to be considered. They are measured in mill-ampere-hour or mAh. It is a measurement of amount of charge or energy it can hold. You power bank capacity should be always greater than the mAh rating of your smartphone”s battery otherwise, the power bank won”t be able to fully charge your phone even once. Ideally buy a power bank that has capacity that is at least with twice the capacity of your phone”s battery.

How to calculate capacity of power bank

A simple equation can be used to convert the 3.7V into 5V.

ACTUAL 5V mAh = 3.7 X Advertised Capacity / 5

For a 10,000mAh power bank – 3.7 X 10,000 / 5 = 7,400 mAh

So a 3.7V 10,000 mAh power bank really only supplies 7,400 mAh at the 5V USB connection. So straight out of the box is a 23% reduction in the stated mAh. This is not the actual experienced level as there is also conversion loss.


Most power banks are small in size that can be easily carried in your pocket or hand bag. The smaller in size, it is better for traveling. But when you are buying a high capacity power bank, they tend to be little bigger. So depending upon your needs buy a power bank that is light in weight and smaller in size, but at the same time have enough capacity to charge your mobile phone.

Ampere Output

Output ampere rating is another important characteristic of a power bank. The high the output ampere rating, the faster it will charge your smartphone. Power bank with output rating 2A will charge your mobile phone much faster than the power bank with 1A output rating. Tablets require more energy, so the power banks with higher Ampere output is preferred to charge tablets.

Number of output USB Ports

Earlier power banks use to have only 1 USB port. But now most power banks that have higher capacity comes two USB port. The more the output port, more devices you will be able to charge at once.

Mistakes People Make While Buying Power Bank

\r\nSome power bank have output that doesn’t match with device(unreal output) ussualy under that it should be. this makes charge a device took more time. with real output the charging proccess can ne faster. How many times of charging is not derives by 30000/2100mah. Mophie makes several power banks that vary in charging capacity. It’s all good having a battery with significant mah capacity but if the battery’s build quality is sub-standard then you’ll be in for disappointment. Enter the portable battery charger.

According to the manufacturer, it is using 5v power output and input. The 2X power reserve’s 5,200 mAh can charge an iPhone 6s (1715 mAh) several times over (for something even more portable, go with Mophie’s 1X). The small device (4.2 ounce) has LED lights to indicate how much battery it has left and, with a USB output and micro USB input, can charge both smartphones and wearable devices. A poorly made battery loses charge quickly over time and makes a serious difference to the life of the product. These things come in all kinds of shapes, sizes, colors and configurations, and they all promise to keep your devices juiced up when there’s no free wall socket to be found. So, as for all 30000mah power bank in the market, standard calculation: 30000/5v/2100= 2-3 times charging.

Since I tend to use my devices a lot, I”ve had my share of experience with external battery packs of a variety of brands. Sprout Powerbanks use a high quality Samsung battery that will keep you full of energy more reliably than that next cup of coffee you’re considering. But how do you find the best device in a category swimming with seemingly identical bricks? As for iphone 4 as guideline, it can charge 3-4 times. I am using the Anker Astro E5 15000mAh Portable Ultra-High Density High Capacity External Battery Backup Charger, which includes an adaptable charging cable, a microUSB adapter, a miniUSB adapter, an Apple 30 pin adapter, a Samsung Galaxy Tab 30 pin adapter, and a carrying case.

The combination gives you power wherever you are without your having to carry any cables. Are they are the same, or should you be shopping around? This powerbank is a new technology using touch screen technology. The cable is thick but flexible, and good construction. While it has only about 70 percent of the usable capacity of the AmazonBasics model, it still packs enough power to add 30 to 50 percent of a charge to the battery of a large smartphone, so long as you don’t mind the 1 A charging rate.

Thus, manufacturer has compressed the power in the good of chipset in order to prolong the lifespan of the powerbank,Normally when you need more juice for your smartphone, tablet, or other mobile electronic device, you plug the USB charging cable in to your computer or to a wall-wart transformer. But you’ll be paying a big premium for the Lightning connector and charging cable—though this model is often on sale, it’s the most expensive of the pocketable packs we tested. You top the device off (or keep using it while it charges in the background) and away you go. If you don’t mind carrying a little extra weight, you might want to trade the built-in cables for the extra capacity of a larger unit

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