I certainly do not intend to say that power bank is not a useful product; also there is no harm in paying power bank price for what it’s worth. However, as a Smartphone user who is tired of own a device which is always low on battery, I would still advice against the use of very high capacity power banks. Paying heft power bank price for extremely powerful power banks takes away one important feature of the power banks, Portability.
We buy power bank because it is a portable source of power that can charge the phone while we are away from a power source. So to buy a power bank that is so heavy that you cannot even carry it around with you seems like a useless preposition unless of course you really need a high capacity power bank that should last you 3-4 days.
For an average Smartphone user, an average capacity power bank is more than enough. To me, buying power bank with capacity 10000mah makes more sense, because the power bank is both powerful and portable. Considering your phone’s battery to be 1500-2000mah, the power bank will easily be able to charge your phone 3.5 times or may be more, depending on the conversion rate and the battery health of your Smartphone.
A power bank 10000mah would cost you 2000-3000; there are brands that even offer it for meek amount. However, do not be fooled by the low price. I, once got a power bank from a brand, not mentioning the name, since there is no purpose of dragging any brand’s name and I must day the performance was nothing compared to what I expected of it. The power bank had a battery capacity of 10000mah but it would only charge my phone 1-2 times which was disappointing, since my phone’s battery is 1750mah, so it should have alteast be able to charge my phone 3-4 times, but it did not. The catch here is that I bought it for mere Rs 1000. Now, if I look back to the day I made the purchase, I considered price to be a primary factor, whereas the quality of the product should have been my major concern. A low quality power bank would not only sustain for short time but it can also affect the battery health of your phone.
It is important to understand that if you buy power bank at a price that sounds too good to be true, the seller is probably tricking you because such low cost would not even justify the high power and the circuit cost that goes into building a power bank.
Make sure that you buy a power bank with good capacity at a moderate price. To be extremely sure of making the right purchase, you can look for power bank price online and compare the reviews of different power banks.