Today almost every smartphone users carry a portable source of power – the Power Bank. But is it safe to use a power bank rather than the wall charger that came with your smartphone? Is it okay to charge your smartphones using power bank?

Should you charge your smartphone with power bank?

Take out your smartphone charger and check the voltage on it, it will be 5V. Now check the power bank that you might be using, it will also be 5V or slightly higher. If this is the case it is good enough. If the power bank is less than 5V then it will not charge the smartphone in fact it will drain the smartphone battery.

You usually will get 5V / + Power banks so you really don’t need to worry. Moreover in case you are using a power bank and for some reason handset is not charging but the handset battery is draining then you should stop using that power bank.

Is it safe to charge your smarphone with a power bank?

How to use Power banks for overnight charging

New smartphones come with cutoff technology that stops the charging process as soon as battery level reached 100%. If you are using such smartphone you can use Power Bank or even wall charger to charge overnight, does not really matter.

How to check if your smartphone comes with battery charging cutoff technology?

Use the charger that came with the handset, charge your smartphone and see what happens when the handset gets fully charged i.e. battery is 100%. If you still see the battery charging icon and/or if there is LED notification and the LED is on then the smartphone does not support cutoff.

Ideally with cutoff tech the smartphone charging should stop at 100% even when the power is connected.

Now if your smartphone does not support cutoff it would make sense to stop the charging process once the battery reaches 100%. Doing so will improve battery life and health. And if cutoff is not supported better not put the handset on overnight charging.

Now you can use a power bank effectively in case your handset does not support cutoff. For this you need to use power bank with battery that is near about the same capacity as your smartphone for example if you smartphone is using 2000 mAh battery go for power banks that come with 2000 to 4000 mAh battery.

The idea is by the time your smartphone gets charged to 100% the power bank batteries will also get depleted. Once the power bank battery is exhausted the charging will stop.

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  1. Every phone comes with power cutoff technology. This technology is there very long back since Nokia brick mobiles. The LED remains on to show the battery is full or not based on LED status colour. Even if LED absent still the there will be cutoff to prevent overcharger. If there’s Absence of overcharging technology then there would be no of blast cases reported.

  2. Two more ideas.

    For those who want to reduce the number of USB charging plugs, lying around, look for a piwer bank with pass through charging which allows you to charge and discharge a power bank at the same time. So you can plug in your power bank to the wall adapter and your phone to the power bank and both will get charged overnight

    Second, nowadays, there are some nice solar power power banks going around, some even waterproof and impact proof so you can hang it outside your luggage with a hook when you go travelling trekking etc sp it is constantly exposed to the sun. Some of these take a long time to pick up any charge but one I have by Tarkan for 899 rs can get charged from 50% to 100% in a single day(6 hours of constant exposure to sunlight) It only gives a 5v 1a discharge but most phones with charge rating under 5v 2a can be charged by it(slightly slower) Useful for those who go trekking etc in places where a power adapter may be tough to find

  3. A couple of ideas more.

    Some powerbanks(mainly those by Intex and some other local companies) don’t seem to slow down the charging(amount of current) at different stages. Typically any battery can be charged at a much higher rate between around 15% and 85% than in the beginning and last phases of charging. But in the early and final stages, a smaller rate is required. When a uniform rate is applied, it can cause heating and fast discharge after charging if the powerbank’s current rating is higher than the charge rating of the phone. In such cases, only use your powerbank to get a quick boost charge in the middle of the day between 15% and 85%. Don’t charge outside this range

    The second is that for phones with fast charging, it is better to use the fast charging sparingly and use your powerbank instead(or a lower rated wall charger) most of the time. Fast charging can damage a battery more quickly. Only use it when you really need a quick charge. Otherwise you can spare your phone and even increase backup by charging with a lower rating power bank

  4. Hi gogi, nice information. It will be more useful if you include about amp’s from power banks.

  5. My fone charges faster on a power-bank, it heats up more and also discharges faster. I stopped using all power-banks and use it only during long journeys.

  6. Bro, in most of the phones, the led won’t be off even after full charge. It just changes the color from red to green.
    But in power banks like ‘Mi’ which I have, the charging gets automatically cutoff, once the mobile gets COMPLETELY charged. This is really a very good feature.
    And also, with bypass charging support, you can also charge the power back as well as your mobile (by connecting it to the power bank) at the same time.

    1. Yes if you read the article it says and/or if there is LED notification and the LED…. but I guess you got the idea.

  7. Have you ever used power bank. Only when we use Power bank then only the LED of phone stops and not when we use OEM charger.

  8. i use Xiaomi powerbank with xiaomi smartphone. during overnight charging, switch off the phone and connect to powerbank. once the charge level reaches 100 percent the powerbank automatically switches off itself and does not supply any charge, and since the smartphone is OFF it does not consume any power and remains at 100 percent charged level. this way it’s double safe from powerbank side as well as smartphone auto cutoff feature.

    1. yes,almost all smartphone these days cut off automatically at 100 percent and resume charging after level drops to 98 percent.