2. Bigger battery, less dependence

Power bank is one super cool invention we have in our smartphone market. It is no longer an odd nowadays and comes as heroes to save your mobile devices at both daily and emergencies situations. However, having to carry the bank, though “light, handy and portable” is not always to most comfortable for you. If your smartphone battery has a capacity of 4,000 mAH or bigger, you will be confident enough to go for a couple of days without the constant worries of running out of battery and the inconvenience of “sticking” into the power bank.

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