It’s true what they say…life doesn’t wait for anyone! Today, we are on the go all the time. With busy lives we have come to rely on the power of our smartphones and other mobile devices. But to keep those power-hungry mobile devices juiced up and ready to roll, a quality power bank with a good capacity is a must. If you have finally made the smart investment in a power bank you may be wondering, how long to charge it for the first time before use. It’s a common question with more than one answer! Here is why.
To begin with, keep in mind the type of power bank you have. In most cases, it will contain a Lithium Ion battery which is great, they are the preferred battery cell type and make a great combination of power and longevity. These batteries go through a number of tests before leaving a factory and because of that, when you buy a power bank it usually has some amount of charge when you get it. To prepare it for use you must give it a proper initial charge before using.
However, the charging time basically depends on two things – the Capacity and the Charging Rate. A handy formula exists to explain it:
Charging time in hours = (power bank capacity in mAh) /(charging rate in mA)
If you are bad at math (we are too) don’t worry, it can be explained in a simple way. Remember that most mobile devices like power banks are designed to charge via a Micro USB input. This input may come from a wall charger and usually in one of two common amperage – 1A or 2A.
Most modern power banks are designed with a 2A input as a maximum. So if we take an example of a 20,000mAh power bank which is a common size, the 2A input will charge it in about 10 hours. However, if using only a 1A output the time to charge fully would double to around 20 hours.
As another example, the common 10,000mAh power bank will typically charge in about 5 hours using a standard 2A wall charger and about 10 hours with a 1A charger. You can use the above formula based on the size of your power bank to get a good estimate.
Another thing to keep in mind is that for the initial charge before first-time use, the power bank may take up to 5% longer for charging. So as you can see, the time varies depending on the two big factors – size of power bank and output of the charger. A good rule of thumb is to charge the power bank overnight before first use. You may have heard that it’s not good to leave a power bank charged in overnight to avoid overcharging it, but it is perfectly safe to do so. In fact, high-quality chargers have built-in safety protections to stop charging when the battery cells reach full capacity.
Of course, your power bank may be of a smaller size and charge faster or may use special features such as Quick Recharge technology to minimize charging time. Consult your specific manufacturer’s instructions to be sure.
So the answer to the question “How long do I have to charge my power bank the first time?” is that it depends. Use the formula above for a good estimate, charge up your power bank and get on with your life!